With kukurumidza kukura ano zvemagetsi zvemagetsi, PCBA iri kusimukira zvakare kune yakakwira density uye yakakwirira kutendeseka. Kunyange hazvo pcb pcb nePCBA yekugadzira tekinoroji danho rave kuvandudzwa kwazvo, yakajairwa pcb yekutengesa maitiro haizouraye kune chigadzirwa kugadzirwa. Nekudaro, kune zvishandiso zvine diki kwazvo pini nzvimbo, iyo isina musoro dhizaini yePBB yekutengesa pad uye pcb inodzivirira pad ichawedzera kuoma kweiyo SMT yekumonera maitiro uye nekuwedzera iyo njodzi njodzi yePCBA pamusoro pegomo kugadzira.

Tichifunga nezve zvingangodaro zvinogadzirwa uye matambudziko ekuvimbika anokonzerwa neyakagadziriswa dhizaini yePCB yekumisikidza pad uye yekuvharira pad, matambudziko ekugadzirisa anogona kudzivirirwa nekugadzirisa dhizaini yekugadzira dhizaini zvichienderana neicho chaicho chiitiko chePCB nePCBA. Optimization dhizaini kunyanya kubva kumativi maviri, kutanga, PCB LAYOUT optimization dhizaini; Chechipiri, PCB engineering optimization dhizaini. Pasuru dhizaini zvinoenderana neIPC 7351 yakajairwa package raibhurari uye tarisa kune iyo pad saizi yakakurudzirwa mune yekutsanangurwa kwechigadzirwa. Zvekukurumidza dhizaini, Layout mainjiniya anofanirwa kuwedzera saizi yepadhi zvinoenderana neyakakurudzirwa saizi yekugadzirisa dhizaini. Kureba uye upamhi hwePCB Welding pad inofanirwa kuwedzerwa ne0.1mm, uye kureba uye upamhi hwebhuruu yekucheresa padhi inofanirwa kuwedzerwa ne0.1mm pahwaro hwedhizaini rekutenderera. Yakajairika pcb yekudzivirira kutemesa maitiro inoda kuti kumucheto kwepad kunofanirwa kuvharwa ne0.05mm, uye iyo yepakati bhiriji yemapadhi maviri anofanira kunge akakura kupfuura 0.1mm. Muchikamu chekugadzira chePCB engineering, kana saizi yemapedhi esolder isingakwanise kukwidziridzwa uye yepakati solder zambuko pakati pemapadhi maviri iri pasi pe0.1mm, pcb yekugadzira inotora boka solder ndiro hwindo dhizaini yekurapa. Kana iwo maviri pad pad kumucheto spacing yakakura kupfuura 0.2mm pad, zvinoenderana neyakajairwa pad yekupakata dhizaini; Kana chinhambwe pakati pemakona emapads maviri chiri pasi pe0.2mm, iyo DFM optimization dhizaini inodiwa. Iyo DFM yekugadzirisa dhizaini nzira inobatsira mukugadzirisa kwehukuru hwepadhi. Onai kuti soldering zvinoyerera mu soldering muitiro anogona kuumba shoma chipingamupinyi ikanyanya apo pcb anogadzirwa. Kana chinhambwe chemucheto pakati pemapedhi maviri chakakura kupfuura 0.2mm, dhizaini yeinjiniya ichaitwa zvinoenderana nezvinodiwa. Kana chinhambwe pakati pemicheto yemapadhi maviri chiri pasi pe0.2mm, dhizaini yeDFM inodiwa. Iyo DFM nzira yeinjiniya dhizaini inosanganisira dhizaini yekugadzirisa yeiyo welding kuramba dhesiki uye mhangura kucheka kweiyo welding yekubatsira rukoko. Ukuru hwemhangura-yekucheka inofanirwa kureva kune chishandiso chishandiso. Iyo-yemhangura-yekucheka pad inofanira kunge iri mukati mehukuru saizi yeyakakurudzirwa pad dhizaini, uye pcb inovharira yekumonera dhizaini inofanirwa kuve imwechete-padhi dhizaini, ndiko kuti, iro rinovharira zambuko rinogona kuvharwa pakati pemapadhi. Onai kuti PCBA kugadzira muitiro, pane ichivharira nomoto zambuko pakati Mapedhi maviri kuti voga, kudzivisa nomoto chitarisiko yepamusoro matambudziko uye zvemagetsi kuita akavimbika matambudziko. Welding resistance film in the process of welding assembly can zvinobudirira prevent welding bridge bridge short connection, for high-density density PCB with fine spacing pins, if the open welding bridge between the pins is isolated, PCBA kugadzira chirimwa hakugone kuvimbisa yemhando yekutenderera yemhando chigadzirwa. Kune pcb yakasarudzika nekutsemura pachena kweyepakureba uye pini dzakapatsanuka, ino PCBA yekugadzira fekitori inoona kuti inouya zvinhu zvePCB yakaremara uye haitenderi kugadzirwa kwepamhepo. Kuti udzivise njodzi dzemhando yepamusoro, fekitori yekugadzira yePCBA haivimbise iwo mhando yemhando yezvigadzirwa kana mutengi achimanikidza kuisa zvigadzirwa online. Zvinofungidzirwa kuti matambudziko emhando yepamusoro mukugadzirwa kwefekitori yePCBA ichagadziriswa kuburikidza nekutaurirana.

Nyaya Yekudzidza:

Dhizaini yakadomwa saizi yebhuku, mudziyo wepini wepakati nzvimbo: 0.65mm, pini upamhi: 0.2 ~ 0.4mm, pini kureba: 0.3 ~ 0.5mm. Ukuru hwepadhed pad. 0.8mm, uye hupamhi hwe unilateral solder pad inowedzerwa ne0.5mm. Zvinoenderana neyakajairika Welding ouinjiniya dhizaini, saizi yeumwe unowirirana yekutenderera padhi inofanirwa kuve yakakura kudarika saizi yemwenje padhi 0.05mm, zvikasadaro kuchave nenjodzi yekutengesa kuyerera kunovhara iyo yekutenderera pad. Sezvinoratidzwa mumufananidzo 5, hupamhi hwesimbi imwe chete ndeye 0.05mm, inosangana nezvinodiwa mukugadzira kwekugadzira uye kugadzirisa. Nekudaro, iyo nhambwe iri pakati pemicheto yemapedhi maviri ingori 0.05mm, iyo isingasviki netekinoroji zvinodikanwa zveiyo shoma kuramba nemoto zambuko. Injiniya dhizaini yakanangana dhizaini mutsara wese wechip pini dhizaini yeboka rinotenderera ndiro dhizaini dhizaini. Gadzira bhodhi uye pedza SMT chigamba zvinoenderana neinjiniya dhizaini. Kubudikidza nebasa rekuyedza, iyo yekumesa kutadza chiyero cheiyo chip inopfuura 50%. Zvekare kuburikidza neyeyese tembiricha kutenderera kuyedza, inogona zvakare kuongorora inopfuura 5% yeiyo isina kukwana chiyero. Sarudzo yekutanga kuongorora kuongorora kwechigadzirwa (kakapetwa ka20 kagirazi), uye zvoonekwa kuti pane tini slag uye nemoto zvakasara pakati pemapini epedyo echip. Chechipiri, kukundikana kweiyo chigadzirwa kuongororwa, kwakaona kuti kukundikana kwechipini chip chipfupi redunhu kwakatsva. Tarisa kuIPC 7351 standard package raibhurari, dhizaini yekubatsira padhiza iri 1.2mm * 0.3mm, dhizaini yebhagi padhi iri 1.3 * 0.4mm, uye nzvimbo yepakati pakati pepadhuze padhuze ndeye 0.65mm. Kuburikidza pamusoro design, kukura unilateral nomoto 0.05mm zvinowirirana zvinodiwa pcb kugadzira michina, uye kukura pedyo nomoto kumucheto spacing 0.25mm inosangana zvinodiwa nomoto zambuko michina. Kuwedzera iyo redundancy dhizaini yeiyo yekuwacha zambuko inogona kudzikisira zvakanyanya hutachiona hwehunhu, kuti uvandudze kuvimbika kwezvigadzirwa. Upamhi hwebetsero hwomoto pad ndeyendarira-yakatemwa, uye saizi yekudzivirira yekutengesa padhi yakagadziriswa. Onai kuti mupendero uri pakati pemachira maviri echigadzirwa wakakura kupfuura 0.2mm uye mupendero uripakati pemapadhi maviri echigadzirwa wakakura kupfuura 0.1mm. Iyo kureba kwemapadhi emapadhi maviri anoramba asina kuchinja. Inogona kusangana nemagadzirirwo emagetsi ePBB yekudzivirira kutenderera imwe chete hwindo dhizaini. Tichifunga nezve mapadhi ataurwa pamusoro, padhi uye nemishonga yekushongedza dhizaini yakagadziridzwa nechirongwa chiri pamusoro. Nzvimbo yekumucheto yemapedhi ari padhuze yakakura kupfuura 0.2mm, uye nzvimbo yekumusoro yemapidha ekudzivirira iwadhi yakakura kupfuura 0.1mm, iyo inogona kusangana nezvinodiwa zvekudzivirira kutenderera kweiyo bhiriji yekugadzira maitiro. Mushure mekukwenenzvera kushomeka kurwisa dhizaini kubva kuPCB LAYOUT dhizaini uye pcbinjiniya dhizaini, ronga kudzorerazve iyo yakafanana nhamba yePCB, uye kupedzisa kumisikidza kugadzirwa zvinoenderana zvakafanana maitiro.