Kusarudza pcb yakakosha ukobvu inova nyaya kana a yakadhindwa redunhu bhodhi (PCB) mugadziri anogamuchira chitauro chinokumbira multilayer dhizaini uye zvinhu zvinodiwa hazvikwani kana kusatombotaurwa zvachose. Dzimwe nguva izvi zvinoitika nekuti kusanganiswa kwePCB yakakomberedzwa zvinhu zvinoshandiswa haina kukosha pakuita; If the overall thickness requirement is met, the end user may not care about the thickness or type of each layer.

Asi pane dzimwe nguva, kuita kwakanyanya kukosha uye ukobvu hunoda kudzorwa zvine mutsindo kuitira kuita kwakaringana. If the PCB designer clearly communicates all requirements in the documentation, then the manufacturer will know what the requirements are and will set the materials accordingly.

Nyaya dzePCB vagadziri vanofanirwa kufunga

Inobatsira vagadziri kunzwisisa izvo zvishandiso zviripo uye zvinowanzo shandiswa, saka ivo vanokwanisa kushandisa yakakodzera dhizaini mitemo kuvaka PCBS nekukurumidza uye nenzira kwayo. Izvo zvinotevera kurondedzerwa kupfupi kwekuti ndezvipi zvinhu zvemhando vagadziri vanosarudza kushandisa, uye izvo zvavangangoda kutenderedza basa nekukurumidza pasina kunonoka chirongwa chako.

Nzwisisa pcb laminate mutengo uye kuverenga

Izvo zvakakosha kuti unzwisise kuti pcb laminate zvigadzirwa zvinotengeswa uye zvinoshanda mu “system” uye kuti iyo yepakati zvinhu uye prereg yakachengetedzwa nemugadziri kuti ishandiswe nekukurumidza kazhinji kubva kune imwecheteyo sisitimu. In other words, the constituent elements are all parts of a particular product, but with some variations, such as thickness, copper weight and prepreg style. Pamusoro pekujairirana nekudzokororwazve, pane zvimwe zvikonzero zvekutora huwandu hushoma hwemhando dzemarara.

Prepreg uye yemukati epakati masisitimu akagadzirirwa kushanda pamwechete, asi anogona kusashanda nemazvo kana achishandiswa pamwe chete nezvimwe zvigadzirwa. Semuenzaniso, iyo Isola 370HR yakakosha zvinhu hazvizoshandiswe mudura rakafanana neNelco 4000-13 prereg. It’s possible they’ll work together in some situations, but more likely they won’t. Masystem eHybrid anokuendesa kunzvimbo isina kudzidza, uko hunhu hwezvinhu (zvinonyatso kuzivikanwa kana uchishandiswa senzira dzakafanana) hazvichagone kutorwa sezvisinganetsi. Careless or unwitting mixing and matching of material types can lead to serious failures, so no manufacturer will mix and match unless the type is proven to be suitable for “mixed” stacking.

Chimwe chikonzero chekuchengetedza yakamanikana zvinhu zvinyorwa ndeye yakakwira mutengo weUL chitupa, saka zvakajairika muPCB indasitiri kudzikamisa huwandu hwezvitupa kusarudzo diki diki yezvinhu. Manufacturers will often agree to make products on laminate without standard stock, but be aware that they cannot provide UL certification through QC documentation. Iyi sarudzo yakanaka kune asiri-UL magadzirirwo kana ikaburitswa uye ichibvumiranwa pamberi uye mugadziri anoziva nezvezvinodiwa zvekugadziriswa kweiyo laminating system iri mubvunzo. For UL work, it is best to find out the manufacturer inventory of your choice and design boards to match it.

Ipc-4101d and foil construction

Zvino izvo chokwadi ichi chiri pachena, pane zvimwe zvinhu zviviri zvekuziva usati wasvetukira mukugadzirwa. Kutanga, zvakanakisa kudoma laminates zvinoenderana neindasitiri yakatarwa IPC-4101D uye kwete kutumidza zvimwe zvigadzirwa izvo zvisiri munhu wese anogona stock.

Secondly, it is easiest to construct multiple layers using the “foil” construction method. Kuvaka kwembiru kunoreva kuti madenga epamusoro neepasi (ekunze) akagadzirwa kubva pachidimbu chendarira chefirita uye chakanamirwa kune mamwe masara ane prepreg. Kunyangwe zvingaite senge zvine hungwaru kuvaka iyo 8-rukoko pcb ine ina mbiri-mativi macores, zviri nani kushandisa foil kunze kwekutanga kutanga, uyezve matatu macores eL2-L3, L4-L5, uye L6-L7. Mune mamwe mazwi, ronga kugadzira akawanda-masheya stack kuitira kuti iyo nhamba yemakoresi iri seinotevera: (huwandu hwese hwetatu kubvisa 2) hwakakamurwa na2. Tevere, zvinobatsira kuziva chimwe chinhu nezve epakati zvivakwa. Ivo pachavo.

Iyo yepakati inopihwa mune yakazara yakaporeswa PIECE yeFR4 nendarira yakafukidzwa pamativi ese maviri. Makore ane huwandu hwakasiyana hwehukobvu, uye mamwe anowanzo shandiswa saizi anowanzo chengetwa mumatanda akakura. Aya ndiwo makobvu ekuchengeta mundangariro, kunyanya kana iwe uchifanira kuodha zvigadzirwa zvekuchinjisa nekukurumidza kuitira kuti usatore nguva yekutungamira yeodha kumirira izvo zvisina kujairika zvinhu kuti zviuye kubva kune anogovera.

Common simbi moyo uye mhangura ukobvu

Iwo macores anowanzo shandiswa kuvaka 0.062 “gobvu multilayers ari 0.005”, 0.008 “, 0.014”, 0.021, 0.028 “, uye 0.039”. Inventory ye0.047 “yakajairika, sezvo dzimwe nguva ichishandiswa kuvaka mabhodhi maviri-mana. Umwe musimboti unogara uchichengetwa i0.059 mukati., Nekuti unoshandiswa kugadzira mabhodhi maviri-ply ari 2 mukati. Akakora, asi anogona kungoshandiswa kumabhodhi ekuwedzera akawandisa, akadai se0.062 mukati. Kune ino chinzvimbo, isu tinogumira chiyero kune yepakati dhizaini ine yekupedzisira yezita rekuremera kwe0.062 inch.

Mhangura yehupamhi inotangira kubva pahafu ounce kusvika kumatatu kusvika mana maiza, zvichienderana neyakagadzirwa musanganiswa wechigadzirwa, asi masheya mazhinji anogona kunge ari mairi maviri kana mashoma. Chengeta izvi mundangariro uye yeuka kuti angangoita ese masheya anoshandisa iwochete mhangura uremu pamativi ese epakati. Edza kudzivisa pcb dhizaini inoda zvinoda mhangura dzakasiyana padivi rega, sezvo kazhinji izvi zvinoda kutenga kwakasarudzika uye kungangoda kumhanyisa kuchaja (kumhanyisa kuendesa), dzimwe nguva kusatombosangana neyakaganhurirwa nemugovera.

Semuenzaniso, kana iwe uchida kushandisa 1oz yemhangura mundege uye kuronga kushandisa H oz yechiratidzo, funga kugadzira ndege muH oz kana kuwedzera chiratidzo ku1oz kuita kuti musimboti ushandise mativi ese semhangura nekurema. Ehezve, iwe unogona chete kuita izvi kana uchikwanisa kusangana nezvinodiwa zvemagetsi zvekugadzira uye uine nzvimbo dzakaringana dzeXY dzekugarisa yakawedzera marongero / nzvimbo dhizaini mitemo yekusangana ne1oz shoma pane iyo chiratidzo cheyero. Kana iwe uchikwanisa kusangana nemamiriro aya, zviri nani kuushandisa sehuremu hwemhangura. Zvikasadaro, ungangoda kufunga mashoma ekuwedzera mazuva enguva yekutungamira.

Tichifunga kuti wasarudza yakakodzera ukobvu hwehupamhi uye huremo hwemhangura huripo, musanganiswa wakasiyana wepepreg mapepa anoshandiswa kumisikidza nzvimbo dzasara dzedhielectric kusvikira pakukora kwese kunodiwa kwasangana. Zvezvigadzirwa izvo zvisingade impedance kudzora, unogona kusiya prepreg sarudzo kumugadziri. Ivo vanozoshandisa yavo yavanofarira “standard” vhezheni. Kune rimwe divi, kana iwe uine zvinodiwa impedance, taura izvi zvinodiwa mumagwaro kuitira kuti mugadziri agadzirise huwandu hweprepreg pakati pemakore kuti asangane nemitengo yakatarwa.

Impedance kudzora

Kunyangwe impedance kudzora kuchidikanwa kana kwete, hazvikurudzirwe kuti iwe uedze kunyora mhando uye ukobvu hwe prepreg yenzvimbo yega yega kunze kwekunge iwe uri nyanzvi mune iyi tsika.Kazhinji, zvidimbu zvakadzama zvakadaro zvinoda kugadziriswa, saka zvinogona kukonzera kunonoka. Panzvimbo iyoyo, yako dhayagiramu dhayagiramu inogona kuratidza yepakati ukobvu hwomukati wedenga peya uye kuratidza “prepreg chinzvimbo chinodiwa zvichibva neimedance uye yakazara ukobvu zvinodiwa”. This allows manufacturers to create ideal laminations to match your design.

Iyo nhoroondo

Chidimbu chakaringana chemakorari anoenderana nechitoro chiripo chakakosha kudzivirira kunonoka kusiri madikanwa kana uchiraira kukurumidza kutendeuka uine nguva dzakasimba. Vazhinji vagadziri vePCB vanoshandisa zvakafanana multilayer zvivakwa zvichibva pane imwechete kernel sevanoikwikwidza. Kunze kwekunge pcb yakanyatsogadziriswa, hapana mashiripiti kana kuvaka pachivande. Naizvozvo, zvakakodzera kuti uzvizive nezvinhu zvakasarudzika zveimwe nhurikidzwa uye uchiedza nepese paunogona kugadzira PCB kuti ifanane nayo. Pachagara paine zvinosarudzika pane zvakasarudzika dhizaini, asi kazhinji, zvakajairika zvinhu ndizvo sarudzo yakanakisa.