{"id":898,"date":"2026-01-18T07:37:56","date_gmt":"2026-01-18T07:37:56","guid":{"rendered":"https:\/\/template01.zehannet.net\/?p=898"},"modified":"2026-01-18T07:37:57","modified_gmt":"2026-01-18T07:37:57","slug":"how-do-i-prevent-pcb-warping-during-manufacturing-and-assembly","status":"publish","type":"post","link":"https:\/\/template01.zehannet.net\/ar\/how-do-i-prevent-pcb-warping-during-manufacturing-and-assembly\/","title":{"rendered":"How do I prevent PCB warping during manufacturing and assembly?"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#pcb-warpage-and-bow-and-twist\">PCB warpage and bow and twist<\/a><ul><li><a href=\"#ipc-tm-650-2-4-22-bow-and-twist-measurement\">IPC-TM-650 2.4.22 bow and twist measurement<\/a><\/li><\/ul><\/li><li><a href=\"#copper-balance-and-symmetric-stackup\">Copper balance and symmetric stackup<\/a><ul><li><a href=\"#symmetric-stackup\">Symmetric stackup<\/a><\/li><li><a href=\"#copper-distribution-balance\">Copper distribution balance<\/a><\/li><\/ul><\/li><li><a href=\"#high-tg-fr-4-material-and-cte\">High Tg FR-4 material and CTE<\/a><ul><li><a href=\"#high-tg-fr-4-for-multiple-reflow-cycles\">High Tg FR-4 for multiple reflow cycles<\/a><\/li><li><a href=\"#cte-matching\">CTE matching<\/a><\/li><\/ul><\/li><li><a href=\"#moisture-control-and-pcb-baking\">Moisture control and PCB baking<\/a><ul><li><a href=\"#dry-pack-and-floor-life-discipline\">Dry pack and floor life discipline<\/a><\/li><li><a href=\"#pre-bake-before-assembly\">Pre-bake before assembly<\/a><\/li><\/ul><\/li><li><a href=\"#reflow-profile-and-board-support-fixtures\">Reflow profile and board support fixtures<\/a><ul><li><a href=\"#reflow-profile-uniform-heating\">Reflow profile uniform heating<\/a><\/li><li><a href=\"#board-support-pallets-and-rails\">Board support, pallets, and rails<\/a><\/li><\/ul><\/li><li><a href=\"#stencil-printing-gasketing-and-vacuum-tooling\">Stencil printing gasketing and vacuum tooling<\/a><ul><li><a href=\"#stencil-gasketing\">Stencil gasketing<\/a><\/li><li><a href=\"#vacuum-support-for-flatness\">Vacuum support for flatness<\/a><\/li><\/ul><\/li><li><a href=\"#depanelization-and-stress-relief\">Depanelization and stress relief<\/a><ul><li><a href=\"#depanelization-strategy\">Depanelization strategy<\/a><\/li><li><a href=\"#stress-relief-after-first-thermal-cycle\">Stress relief after first thermal cycle<\/a><\/li><\/ul><\/li><li><a href=\"#warpage-control-checklist-for-manufacturing-and-assembly\">Warpage control checklist for manufacturing and assembly<\/a><\/li><li><a href=\"#practical-scenarios-that-usually-trigger-warpage\">Practical scenarios that usually trigger warpage<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>If you\u2019ve ever watched a PCB \u201cpotato-chip\u201d in reflow, you know the pain. Warpage (often measured as&nbsp;<strong>bow and twist<\/strong>) doesn\u2019t just look bad. It breaks stencil gasketing, shifts fine-pitch parts, and turns BGA solder joints into a rework party.<\/p>\n\n\n\n<p>On a B2B line, this hits fast-turn prototypes and mass production in different ways. Prototypes suffer because designs change weekly. Volume suffers because tiny variation stacks up across panels, ovens, and shifts. The good news: you can control warpage if you treat it like a system problem, not a single-process mistake.<\/p>\n\n\n\n<p>If you\u2019re building with a China-based B2B partner that does quick-turn prototyping and PCB assembly, you\u2019ll get the best results when your&nbsp;<strong>design rules + material calls + SMT process controls<\/strong>&nbsp;all line up. Start here: the factory-side view from our&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/\">homepage<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"720\" src=\"https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-2.jpg\" alt=\"How do I prevent PCB warping during manufacturing and assembly\" class=\"wp-image-901\" title=\"\" srcset=\"https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-2.jpg 960w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-2-600x450.jpg 600w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-2-300x225.jpg 300w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-2-768x576.jpg 768w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"pcb-warpage-and-bow-and-twist\">PCB warpage and bow and twist<\/h2>\n\n\n\n<p>Most teams talk about \u201cwarpage\u201d like it\u2019s one thing. In reality, you\u2019re dealing with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Bow<\/strong>: the board curves like a shallow arc.<\/li>\n\n\n\n<li><strong>Twist<\/strong>: corners lift in different directions.<\/li>\n<\/ul>\n\n\n\n<p>You want a measurable spec, because \u201clooks flat\u201d fails the moment a different operator checks it.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ipc-tm-650-2-4-22-bow-and-twist-measurement\">IPC-TM-650 2.4.22 bow and twist measurement<\/h3>\n\n\n\n<p>A practical way to manage risk is to define bow-and-twist limits in your incoming QC and assembly spec. Many SMT programs use&nbsp;<strong>\u22640.75%<\/strong>&nbsp;for assembled boards, while some non-SMT use looser limits like&nbsp;<strong>\u22641.5%<\/strong>. Don\u2019t copy numbers blindly. Match your product: BGA density, board size, thickness, and your reflow process window.<\/p>\n\n\n\n<p>If you already run strict inspection and traceability, align warpage control with your overall&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/quality\/\">quality process<\/a>&nbsp;so the fab and SMT teams use the same yardstick.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"720\" src=\"https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-3.jpg\" alt=\"How do I prevent PCB warping during manufacturing and assembly\" class=\"wp-image-902\" title=\"\" srcset=\"https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-3.jpg 960w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-3-600x450.jpg 600w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-3-300x225.jpg 300w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-3-768x576.jpg 768w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"copper-balance-and-symmetric-stackup\">Copper balance and symmetric stackup<\/h2>\n\n\n\n<p>If you only fix reflow, you\u2019ll keep chasing symptoms. Design imbalance creates built-in stress, then heat makes it show up.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"symmetric-stackup\">Symmetric stackup<\/h3>\n\n\n\n<p>A&nbsp;<strong>symmetric stackup<\/strong>&nbsp;means the layers above and below the centerline mirror each other in copper weight and dielectric thickness. When one side expands more than the other in heating, the board bends. Symmetry keeps the forces closer to neutral.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"copper-distribution-balance\">Copper distribution balance<\/h3>\n\n\n\n<p>Copper balance is the quiet killer. Here\u2019s what \u201cbad\u201d looks like:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Top layer is a solid ground pour.<\/li>\n\n\n\n<li>Bottom layer is sparse routing.<\/li>\n\n\n\n<li>Inner planes are uneven because you \u201cjust needed one extra plane.\u201d<\/li>\n<\/ul>\n\n\n\n<p>That\u2019s a warpage recipe, especially on larger panels. Use copper thieving, plane balancing, and keep heavy copper areas matched across layers.<\/p>\n\n\n\n<p>If you\u2019re doing complex builds, route the discussion through your manufacturer\u2019s&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/capabilities\/\">capabilities<\/a>&nbsp;page and stackup review process early, not after your first warped batch.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"720\" src=\"https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-1.jpg\" alt=\"How do I prevent PCB warping during manufacturing and assembly\" class=\"wp-image-900\" title=\"\" srcset=\"https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-1.jpg 960w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-1-600x450.jpg 600w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-1-300x225.jpg 300w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-1-768x576.jpg 768w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"high-tg-fr-4-material-and-cte\">High Tg FR-4 material and CTE<\/h2>\n\n\n\n<p>When the board heats up near or above&nbsp;<strong>Tg<\/strong>, the resin softens. That\u2019s when gravity, component weight, and conveyor support start to matter a lot more.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"high-tg-fr-4-for-multiple-reflow-cycles\">High Tg FR-4 for multiple reflow cycles<\/h3>\n\n\n\n<p>If you run double-sided SMT, selective solder, or multiple reflow passes, consider&nbsp;<strong>high Tg FR-4<\/strong>. It won\u2019t magically prevent warpage, but it gives you a wider process window before the board behaves like a warm noodle.<\/p>\n\n\n\n<p>A real shop-floor example: a TV mainboard with big copper planes and connectors can stay flat in fab, then warp during assembly because the thermal cycle is harsher than the fabrication bake. High Tg helps, and so does better support during reflow.<\/p>\n\n\n\n<p>You\u2019ll see this come up often in high-layer-count and fine-pitch builds. If that\u2019s your world, check the&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/services\/advanced-pcb\/\">advanced PCB<\/a>&nbsp;scope and make material selection part of the RFQ package.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"cte-matching\">CTE matching<\/h3>\n\n\n\n<p>CTE mismatch (especially through-thickness) increases stress during heat-up and cool-down. You don\u2019t need a PhD to manage this. Just avoid \u201csurprise substitutions,\u201d and lock the laminate system in your build notes for OEM\/ODM and repeat orders.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"moisture-control-and-pcb-baking\">Moisture control and PCB baking<\/h2>\n\n\n\n<p>Moisture sneaks in during storage and shipping. Then reflow turns it into pressure. Even if you don\u2019t see delamination, moisture can amplify warpage because the material response becomes less stable.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"dry-pack-and-floor-life-discipline\">Dry pack and floor life discipline<\/h3>\n\n\n\n<p>Use dry pack, desiccant, and sensible floor-life rules. If your boards sit open in a humid room for days, they\u2019re basically pre-loading the next reflow cycle with extra stress.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"pre-bake-before-assembly\">Pre-bake before assembly<\/h3>\n\n\n\n<p>Pre-bake isn\u2019t a cure-all, but it helps when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>boards have long storage time,<\/li>\n\n\n\n<li>you run high-temp lead-free profiles,<\/li>\n\n\n\n<li>you see inconsistent warpage from lot to lot.<\/li>\n<\/ul>\n\n\n\n<p>Talk to your assembly partner about what they standardize in their&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/services\/pcb-assembly\/\">PCB assembly service<\/a>&nbsp;flow so baking doesn\u2019t become \u201ctribal knowledge.\u201d<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"720\" src=\"https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-4.jpg\" alt=\"How do I prevent PCB warping during manufacturing and assembly\" class=\"wp-image-899\" title=\"\" srcset=\"https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-4.jpg 960w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-4-600x450.jpg 600w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-4-300x225.jpg 300w, https:\/\/template01.zehannet.net\/wp-content\/uploads\/2026\/01\/How-do-I-prevent-PCB-warping-during-manufacturing-and-assembly-4-768x576.jpg 768w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"reflow-profile-and-board-support-fixtures\">Reflow profile and board support fixtures<\/h2>\n\n\n\n<p>Even a perfect stackup can warp if the oven setup is sloppy. Heat makes stress visible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"reflow-profile-uniform-heating\">Reflow profile uniform heating<\/h3>\n\n\n\n<p>You\u2019re trying to reduce temperature gradients across the panel. Big gradients mean one area expands while another lags, so the board bends.<\/p>\n\n\n\n<p>Simple moves that help:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>keep soak stable,<\/li>\n\n\n\n<li>avoid aggressive ramp rates when you don\u2019t need them,<\/li>\n\n\n\n<li>don\u2019t cool too fast if it triggers sudden stress lock-in.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"board-support-pallets-and-rails\">Board support, pallets, and rails<\/h3>\n\n\n\n<p>Support matters most when the PCB is soft at peak temperature. Use rails, pallets, or dedicated support tooling for thin boards, large panels, and connector-heavy assemblies.<\/p>\n\n\n\n<p>If you build mixed products, document fixture rules by board family. Otherwise the night shift will \u201cmake it work,\u201d and your warpage graph will look like a rollercoaster.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"stencil-printing-gasketing-and-vacuum-tooling\">Stencil printing gasketing and vacuum tooling<\/h2>\n\n\n\n<p>This is where warpage shows up first on most SMT lines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"stencil-gasketing\">Stencil gasketing<\/h3>\n\n\n\n<p>A warped PCB doesn\u2019t seal well against the stencil. That creates paste smears, insufficient deposits, and bridging. People blame the stencil. The real issue is contact consistency.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"vacuum-support-for-flatness\">Vacuum support for flatness<\/h3>\n\n\n\n<p>Vacuum tooling (or well-designed mechanical support) pulls the PCB flat during print. It\u2019s a straightforward fix when you can\u2019t redesign the stackup right away, like during a fast prototype sprint.<\/p>\n\n\n\n<p>If you\u2019re iterating quickly, keep your fab + SMT loop tight through&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/services\/pcb-fabrication\/\">PCB fabrication<\/a>&nbsp;+ assembly feedback, so you stop re-learning the same lesson every build.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"depanelization-and-stress-relief\">Depanelization and stress relief<\/h2>\n\n\n\n<p>Panel design can either stabilize your process or trap stress until it explodes in reflow.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"depanelization-strategy\">Depanelization strategy<\/h3>\n\n\n\n<p>V-score, tab-route, mouse-bites\u2014each choice changes how stress distributes. In some builds, selective depanelization between reflow steps helps reduce constraint and lets the board relax.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"stress-relief-after-first-thermal-cycle\">Stress relief after first thermal cycle<\/h3>\n\n\n\n<p>If you see repeatable warpage only after the first reflow pass, your panel constraints may be locking the board into an unhappy shape. Adjust rails, tab locations, or support points so the board can expand and contract without fighting the panel frame.<\/p>\n\n\n\n<p>For high-mix OEM programs, it helps to keep examples and lessons learned in your internal knowledge base. If you share public notes, your&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/blog\/\">blog<\/a>&nbsp;can also act as a lightweight playbook for your buyers and CM partners.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"warpage-control-checklist-for-manufacturing-and-assembly\">Warpage control checklist for manufacturing and assembly<\/h2>\n\n\n\n<p>Here\u2019s a quick table you can drop into a DFM\/DFT report. It gives you clear actions, plus named sources (standards and industry papers) without sending readers to external links.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Control point (keyword)<\/th><th>What you do on the floor<\/th><th>What it prevents<\/th><th>Source you can cite<\/th><\/tr><\/thead><tbody><tr><td>Bow and twist spec<\/td><td>Set bow\/twist limit and measure consistently<\/td><td>\u201cFlat to me\u201d arguments, inconsistent QC<\/td><td>IPC-TM-650 2.4.22; IPC-6012 (warpage limits used in industry)<\/td><\/tr><tr><td>Symmetric stackup<\/td><td>Mirror copper and dielectric across centerline<\/td><td>Built-in stress that shows up in reflow<\/td><td>Industry warpage studies on stackup symmetry<\/td><\/tr><tr><td>Copper distribution balance<\/td><td>Match copper density layer-to-layer<\/td><td>Local bending, panel \u201cbanana\u201d<\/td><td>Design-for-manufacture guidance on copper balance<\/td><\/tr><tr><td>High Tg FR-4<\/td><td>Use higher Tg for multi-reflow builds<\/td><td>Softening at peak temp, permanent set<\/td><td>Material selection guidance for lead-free SMT<\/td><\/tr><tr><td>Moisture control + pre-bake<\/td><td>Dry pack, floor-life rules, bake when needed<\/td><td>Steam stress, unstable board behavior<\/td><td>Assembly reliability practice guides<\/td><\/tr><tr><td>Reflow profile uniform heating<\/td><td>Reduce gradients, avoid unnecessary aggressive ramps<\/td><td>Thermal bending, stress lock-in<\/td><td>SMT process papers on warpage drivers<\/td><\/tr><tr><td>Board support fixtures<\/td><td>Rails\/pallets\/support pins, especially for thin boards<\/td><td>Sagging at peak temp, repeat warp<\/td><td>SMT best practices on support tooling<\/td><\/tr><tr><td>Stencil gasketing + vacuum support<\/td><td>Vacuum tooling or tailored support under print<\/td><td>Paste defects from poor stencil contact<\/td><td>SMT printing studies referencing gasketing sensitivity<\/td><\/tr><tr><td>Depanelization strategy<\/td><td>Optimize tabs\/rails, relieve constraint when needed<\/td><td>Warpage that appears only after reflow<\/td><td>Panelization and stress constraint analyses<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"practical-scenarios-that-usually-trigger-warpage\">Practical scenarios that usually trigger warpage<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Large control boards with connector forests<\/strong>: heavy parts act like weights at peak temp. Support points matter more than you think.<\/li>\n\n\n\n<li><strong>Fine-pitch BGA + thin FR-4<\/strong>: even mild warp can open joints or cause head-in-pillow style failures.<\/li>\n\n\n\n<li><strong>Heavy copper power boards<\/strong>: copper imbalance becomes obvious, and reflow gradients get worse.<\/li>\n\n\n\n<li><strong>Rigid-flex and flex builds<\/strong>: different materials, different behavior. Treat them as a special case, not \u201cjust another PCB.\u201d<\/li>\n<\/ul>\n\n\n\n<p>If you\u2019re sourcing for OEM\/ODM, bulk buys, or repeat wholesale orders, lock these controls into your RFQ and drawing notes. Then route the execution through the right teams:&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/services\/\">services<\/a>,&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/products\/\">products<\/a>, and a clear handoff to&nbsp;<a href=\"https:\/\/template01.zehannet.net\/ar\/contact-us\/\">contact us<\/a>&nbsp;when you need a fast DFM check.<\/p>\n\n\n\n<p>A flat PCB isn\u2019t luck. You earn it by balancing the design, choosing stable materials, and keeping SMT support and profiles under control. That\u2019s how you protect yield, keep rework down, and ship on time\u2014especially when you\u2019re running quick-turn prototypes today and mass production tomorrow.<\/p>","protected":false},"excerpt":{"rendered":"<p>Stop PCB warping by balancing copper and stackup, choosing high-Tg materials, controlling moisture, tuning reflow, and using fixtures for printing and soldering.<\/p>","protected":false},"author":1,"featured_media":901,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[617,620,619,621,588,618],"class_list":["post-898","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-market-trends","tag-bow-and-twist","tag-copper-balance","tag-pcb-warpage","tag-reflow-profile","tag-smt-assembly","tag-symmetric-stackup"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/posts\/898","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/comments?post=898"}],"version-history":[{"count":1,"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/posts\/898\/revisions"}],"predecessor-version":[{"id":903,"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/posts\/898\/revisions\/903"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/media\/901"}],"wp:attachment":[{"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/media?parent=898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/categories?post=898"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/template01.zehannet.net\/ar\/wp-json\/wp\/v2\/tags?post=898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}