Heavy Copper PCB Stack-up: Kuenzanisa Kuita uye Kugadzirwa

ziviso

Dhizaini yeheavy copper stack-up PCB inomiririra dambudziko guru reinjiniya mukushandiswa kwemagetsi emagetsi emazuva ano. Zvichitsanangurwa nehuremu hwemhangura hwe3 oz/ft² kana kupfuura, maPCB eheavy copper anoda magadzirirwo akasarudzika estack-up akasiyana zvakanyanya nemabhodhi edunhu akajairwa. Magadzirirwo estack-up anokanganisa zvakananga kusimba kwechiratidzo, nzira dzekupararira kwekupisa, kusimba kwemuchina, uye pakupedzisira, kugona kugadzirwa.

Ichi chinyorwa chinoongorora maitiro ekuwana yakakwana inorema yemhangura PCB stack-up dhizaini nekuyananisa kuita zvinodiwa nezvisungo zvekugadzira.

Kunzwisisa Basa reHeavy Copper PCB Stack-up

Magetsi uye Anopisa Mabasa eStack-up Dhizaini

Kurongeka kwekuisa zvinhu muPCB dzemhangura dzinorema kunotungamira zvinhu zvitatu zvakakosha: kugona kwekutakura magetsi , kushanda zvakanaka kwekupisa, uye kusimba kwechimiro pasi pekumanikidzwa kwekupisa. Kusiyana nemaPCB akajairwa ukobvu hwemhangura husingawanzopfuura 2 oz, mabhodhi emhangura anorema ane kugoverwa kwemhangura kusingaenzaniswi izvo zvinogadzira matambudziko akasiyana panguva yekudzvanya. Matanda emhangura akakora anoderedza kuyerera kweresin panguva yekudzvanya, izvo zvinogona kukonzera mavoid kana delamination kana ukobvu hwe dielectric husina kutsanangurwa zvakakwana.

Zviyero uye Mhangura Kukobvu Kufunga

IPC-2221 uye IPC-6012 zviyero zvinopa zvinodiwa zvekutanga zvehukobvu hwemhangura uye kuvaka dhizaini, asi inorema mhangura kunyorera inowanzosundira kupfuura izvi zvakatemwa. Musiyano wekutanga mu multilayer PCB dhizaini iri pakuti huzhinji hwemhangura hunokanganisa sei kupisa kwekuwedzera coefficient mismatch pakati pematanho. Iyo 6 oz yemukati layer inokura zvakasiyana pane 3 oz yekunze layer panguva yekushisa bhasikoro, ichigadzira kushushikana kwemukati kunoda kutariswa kwakajeka kubva padanho rekutanga dhizaini.

Yakakosha Dhizaini Mafungiro eHeavy Copper PCB Stack-ups

Copper Distribution uye Symmetry

Kudzikamisa mhangura ukobvu mukati me-stack-up kunoderedza warpage uye kushushikana kwemukati panguva yelamination uye kupisa bhasikoro. Kana mativi ekumusoro neazasi achisiyana zvakanyanya mukurema kwemhangura, kuwedzera kusawirirana kunogona kukonzera uta kana kumonyoroka, kuderedza goho regungano. Vagadziri vanofanirwa kuratidzira kugovera kwemhangura kwakatenderedza bhodhi centreline uye kugadzirisa mapatani endege kuchengetedza chiyero chemagetsi uye kugadzikana kwechimiro.

Dielectric Ukobvu uye Resin Kuyerera Kudzora

Yakakodzera dielectric ukobvu inovimbisa kukwana resin kuyerera kuzadza nzvimbo yakakasharara yemafoiri emhangura akakora. Kusakwana nzvimbo kunotungamira kune voids kana delamination iyo inonetesa kuvimbika kwekudzivirira. Sezvo copper etch-back inoderedza inoshanda dielectric ukobvu, vagadziri vanofanirwa kuwedzera 0.002-0.003 inches kune mazita ekutanga prepreg kukosha apo mhangura inodarika 4 oz kuchengetedza inowirirana insulation quality.

Via Zvimiro uye Plating Matambudziko

Kushanda zvakanaka kweVia kunoenderana nekuwana mhangura yakafanana, izvo zvinova zvakaoma nezvikamu zvekunze zvinorema. Mavhiya akavharika uye akavharika anobatsira kuderedza kureba kwenzira yemagetsi, kunatsiridza kufambiswa kwemhepo inopisa, uye kunatsiridza kufanana kweplating zvichienzaniswa nemaburi akazara. Kunyangwe zvichida lamination yakatevedzana, maumbirwo aya anoita basa rakanaka mukugadzirwa kwemagetsi ane simba guru.

Thermal uye Mechanical Bancing

Makobvu emhangura akaturikidzana padhuze nezvinopisa anoita seanoparadzira kupisa mukati, achinatsiridza kupisa kwekupisa uye kusimba kwemichina. Kuchengetedza symmetry yemhangura kunodzivirira kusiyanisa kuwedzera uye flexure panguva yekushanda. Thermal simulation padanho rekugadzira inobatsira kuona pfungwa dzekushushikana uye kukwidziridza stack-up kuvimbika pasi pemutoro.

Manufacturing Limitations and Practical Guidelines

Lamination Process Constraints

Huremu hwemhangura huremu humwechete hunodarika gumi oz zvinonyatso shandura maparamendi elamination, zvinoda kudzvanywa kwakawedzerwa patembiricha yakagadziridzwa. Kupisa kwehuremu hwemhangura yakanyanyisa kunonotsa kutamisa kupisa panguva yekucheneswa, zvichida nguva dzekugara kwenguva refu iyo njodzi resin inoporeswa muzvikamu zvakatetepa zviri pedyo. Vazhinji vanogadzira vanomisa yakanyanya-single-layer mhangura kusvika 8-10 oz kune multilayer inorema mhangura PCB stack-ups.

Dielectric uye Registration Tolerances

Zvishoma zvinogoneka dielectric ukobvu hunoenderana zvakananga nehuremu hwemhangura, sezvo mhangura yakakora inogadzira zororo repamusoro rinoda kuwedzera resin:

• 4-6 oz mhangura - Idiki 0.006-0.008 inch dielectric ukobvu pakati pematanho.
• 8-10 oz mhangura - Yakaderera 0.010 inch kana yakakura dielectric ukobvu inodiwa.
• Solder mask kunyoresa -Kurongeka kunodzikisira pamhangura inorema nekuda kweiyo topography, inoda kuwedzera kushivirira.

Dhizaini Yekusimbisa Nzira

Zvikwata zveinjiniya zvinofanirwa kubatanidza vadyidzani vekugadzira panguva yekutanga stack-up dhizaini kumisikidza inogoneka parameter miganho. Thermal uye mekiniki simulation inosimbisa kugona kwelamination, kuona zvingangoitika resin kuyerera nyaya kana kushushikana mupfungwa usati wazvipira kugadzira. Iyi proactive nzira inodzivirira inodhura dhizaini kutenderera kana yekutanga kuvaka yakundikana bvunzo dzekufanirwa.

Yakagadziridzwa Heavy Copper PCB Stack-up yeMagetsi Emagetsi

Iyo inoshanda 6-layer inorema yemhangura PCB stack-up yeDC-DC converter application inoratidza inoshanda dhizaini misimboti. Iyo yekumisikidza inoisa 6 oz mhangura pamitsetse yemukati 3 uye 4 sesimba rekutanga uye ndege dzepasi, ine 3 oz mhangura pazvikamu zvekunze 1 uye 6 yechiratidzo chekufambisa. Matanho 2 ne5 anoshandisa 2 oz mhangura yekudzora masaini, achigadzira chimiro chakaenzana.

Iyi multilayer stack-up configuration inopa inosvika 0.008 inch dielectric ukobvu pakati pematanho emukati anorema, anokwana kuvharisa kwakavimbika uku uchibata resin kuyerera. Iyo symmetric mhangura yekugovera inodzivirira warpage, uye iyo yakapedza kudzidza huremu hwemhangura kubva kunze kusvika mukati mezvikamu zvinogadzira chimiro chakatsiga chinoshingirira kushushikana kwekupisa. Yese bhodhi ukobvu hunoramba huri pa 0.093 inches, inoenderana neyakajairwa magungano maitiro.

Magadzirirwo emagetsi emagetsi anobatsirwa kubva kune inorema yemhangura PCB stack-up kuburikidza:

• Yakaderedzwa DC kuramba - Yemukati 6 oz ndege dzinotsigira ikozvino density inodarika gumi A/mm² ine shoma voltage kudonha.
• Kuwedzeredza kupararira kwekushisa -Mafuta akakora emhangura anonyatso kuitisa kupisa kure nemagetsi semiconductors.
• Kuvandudzwa kwendege yepasi kutendeseka -Ndege inorema pasi inopa yakanyanya ruzha kudzvinyirirwa kwemaseketi ekudzora.

mhedziso

Inoshanda inorema mhangura PCB stack-up dhizaini inoda kurongeka kutarisisa huremu hwemhangura, dielectric yakatarwa, kuburikidza nezvimiro, uye thermal-mechanical balance. Kubudirira kunoenderana nekunzwisisa zvipingamupinyi zvekugadzira zvinotonga kuyerera kweresin, lamination stress, uye plating kufanana mumabhodhi ane huremu hwemhangura kubva pa3 kusvika ku10 oz. Mainjiniya anobatanidza izvi zvinotariswa panguva yekutanga dhizaini vanowana kuvimbika kwepamusoro uye kugadzira.

Highleap Electronics Inorema Mhangura PCB Kugona:

• Yepamberi stack-up engineering -Kushandirapamwe dhizaini kuvandudza kukwenenzvera kugovera mhangura, dielectric kusarudzwa, uye Thermal manejimendi yekuda kunyorera.
• Unyanzvi hwekugadzira hwakapupurirwa -Kugadzira ruzivo nehuremu hwemhangura hunosvika gumi oz kuyambuka 4-layer kusvika 12-layer masisitimu, kuve nechokwadi chekuenderana uye goho.
• Tsigiro yekusimbisa maitiro - Yakakwana yekupisa uye mekiniki simulation masevhisi kuti aone kuti stack-up inogoneka isati yazvipira kugadzira.

Batanai neHighleap Electronics pakugadzira maPCB emhangura ane machira akawanda anoenzanisa mashandiro emagetsi, kupisa, uye mashandiro emakanika mumasisitimu emagetsi. Chikwata chedu cheinjiniya chinoita kuti magadzirirwo enyu asvike pazvinodiwa uye mamiriro ekugadzira. Tibatei kuti tikurukurei nezvezvinodiwa zvenyu zvePCB dzemhangura dzine machira akawanda.