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Byoherejwe: Ku ya 15 Gashyantare 2022

Ibyiciro:Blog

Etiquetas:pcb, pcbs, pcba, inteko ya pcb, smt, stencil

Ikimenyetso cya PCB ni iki?

PCB Stencil, izwi kandi nka Steel mesh, ni urupapuro rwa stai

nless ibyuma hamwe na lazeri yaciwe ikoreshwa kugirango yimure umubare nyawo wa paste yagurishijwe kumwanya wabigenewe kuri PCB yambaye ubusa kugirango ushyire ibice byubuso.Ikirangantego kigizwe n'ikaramu ya stencil, inshundura z'insinga hamwe n'impapuro.Hano hari imyenge myinshi kuri stencil, kandi imyanya yibi byobo ihuye nimyanya igomba gucapirwa kuri PCB.Igikorwa nyamukuru cya stencil ni ukubika neza umubare ukwiye wa paste yagurishijwe kuri padi kugirango umugurisha uhuza padi nibigize byuzuye neza mubijyanye no guhuza amashanyarazi nimbaraga za mashini.

Mugihe mukoresha, shyira PCB munsi yikaramu, Rimwe

stencil ihujwe neza hejuru yubuyobozi, paste yo kugurisha ikoreshwa hejuru yugurura.

Noneho paste yo kugurisha irekurwa hejuru ya PCB binyuze mumyobo mito kumwanya uhamye kuri stencil.Mugihe icyuma gitandukanijwe nikibaho, paste yo kugurisha izaguma hejuru yumuzunguruko, yiteguye gushyira ibikoresho byo hejuru (SMDs).Kugurisha ibicuruzwa bike byahagaritswe kuri stencil, niko bishyirwa kuri PCB.Iyi nzira irashobora gusubirwamo neza, bityo ituma inzira ya SMT yihuta kandi ihamye kandi ikemeza neza ikiguzi cyinteko ya PCB.

PCB Stencil ikozwe niki?

Ikimenyetso cya SMT gikozwe cyane cyane muburyo bwa stencil, mesh na

urupapuro rudafite ibyuma, hamwe na kole.Ikoreshwa rya stencil ikunze gukoreshwa ni ikadiri ifatanye na meshi ya wire hamwe na kole, byoroshye kubona impapuro zicyuma kimwe, ubusanzwe ni 35 ~ 48N / cm2.Mesh nugukosora urupapuro nicyuma.Hariho ubwoko bubiri bwa meshes, ibyuma bidafite ingese hamwe na polymer polyester mesh.Iyambere irashobora gutanga impagarara zihamye kandi zihagije ariko byoroshye guhinduka no gushira.Nyuma ariko irashobora kumara igihe kirekire ugereranije nicyuma cyuma kitagira umuyonga.Urupapuro rusanzwe rwemewe ni 301 cyangwa 304 urupapuro rutagira umuyonga bigaragara ko rutezimbere imikorere ya stencil binyuze mumikorere myiza yubukanishi.

Uburyo bwo Gukora Stencil

Hariho ubwoko burindwi bwa stencile hamwe nuburyo butatu bwo gukora stencile: guteka imiti, gukata laser na electroforming.Mubisanzwe bikoreshwa ni laser ibyuma.Las

er stencil niyo ikoreshwa cyane munganda za SMT, irangwa ni:

Idosiye yamakuru ikoreshwa mu buryo butaziguye kugabanya amakosa yo gukora;

Umwanya wo gufungura neza kuri SMT stencil ni ndende cyane: ikosa ryibikorwa byose ni ≤ ± 4 μ m ；

Gufungura SMT stencil ifite geometrie, ni conduci

ve ku icapiro no kubumba ibicuruzwa byagurishijwe.

Gukata lazeri inzira: gukora firime PCB, gufata imirongo, dosiye yamakuru, gutunganya amakuru, gukata laser, gusya.Inzira hamwe namakuru menshi yo gutanga amakuru neza kandi ntagahinduka kubintu bifatika;Gufungura Trapezoidal bifasha demoulding, irashobora gukoreshwa mugukata neza, guhendwa kubiciro.

Ibisabwa rusange n'amahame ya PCB Stencil

1. Kugirango ubone icapiro ryiza ryabacuruzi kuri padi ya PCB, umwanya wihariye nibisobanuro byerekana neza ko gufungura neza, kandi gufungura bigomba gukurikiza uburyo bwo gufungura bwerekanwe ku bimenyetso bya fiducial.

2. Kugira ngo wirinde inenge zagurishijwe nkikiraro n’amasaro yagurishijwe, gufungura kwigenga bigomba kuba bito bito ugereranije nubunini bwa PCB.ubugari bwose ntibushobora kurenga 2mm.Ubuso bwa padi ya PCB bugomba guhora burenze bibiri bya gatatu byubuso bwimbere yurukuta rwa aperture ya stencil.

3. Iyo urambuye inshundura, ubigenzure neza, na pa

y yihariye kwitondera gufungura, bigomba kuba bitambitse kandi byegeranye.

4. Hamwe nubuso bwo gucapura hejuru, gufungura hepfo ya mesh bigomba kuba 0,01mm cyangwa 0,02mm mugari kuruta gufungura hejuru, ni ukuvuga ko gufungura bizaba bihinduwe neza kugirango byorohereze neza paste yabagurisha kandi bigabanye isuku ibihe bya stencil.

5. Urukuta rwa meshi rugomba kuba rworoshye.Cyane cyane kuri QFP na CSP bifite intera iri munsi ya 0.5mm, utanga isoko asabwa gukora amashanyarazi mugihe cyo gukora.

6. Mubisanzwe, gufungura stencil ibisobanuro hamwe nuburyo bwibigize SMT bihuye na padi, naho igipimo cyo gufungura ni 1: 1.

7. Ubunini bwuzuye bwurupapuro rwerekana neza kurekura

y'amafaranga yifuzwa yo kugurisha paste ukoresheje gufungura.Kwiyongera kubagurisha birashobora gutera abagurisha ibiraro mugihe abadandaza bake bazatera ingingo zidacuruza intege nke.

Nigute ushobora gukora Stencil ya PCB?

1. 0805 paki irasabwa guca amakariso abiri yo gufungura kuri 1.0mm, hanyuma ugakora uruziga ruciriritse B = 2 / 5Y;A = 0,25mm cyangwa a = 2/5 * l anti tin isaro.

2. Chip 1206 no hejuru: nyuma yuko padi zombi zimuriwe hanze na 0.1mm, kora uruziga rw'imbere B = 2 / 5Y;A = 2/5 * l kuvura amabati.

3. Kuri PCB hamwe na BGA, igipimo cyo gufungura stencil hamwe n'umupira urenga 1.0mm ni 1: 1, naho igipimo cyo gufungura stencil hamwe n'umupira uri munsi ya 0.5mm ni 1: 0.95.

4. Kuri QFP yose na SOP hamwe na 0.5mm ikibanza, igipimo cyo gufungura

o mubyerekezo byose by'ubugari ni 1: 0.8.

5. Ikigereranyo cyo gufungura mubyerekezo birebire ni 1: 1.1, hamwe na 0.4mm ikibanza cya QFP, gufungura mubyerekezo byose byubugari ni 1: 0.8, gufungura mubyerekezo birebire ni 1: 1.1, naho ikirenge kizenguruka hanze.Chamfer radius r = 0,12mm.Ubugari bwuzuye bwo gufungura ibintu bya SOP hamwe na 0,65mm ikibanza cyagabanutseho 10%.

6. Iyo PLCC32 na PLCC44 byibicuruzwa rusange bisobekeranye, icyerekezo cy'ubugari cyose ni 1: 1 naho icyerekezo cy'uburebure ni 1: 1.1.

7. Kubikoresho rusange bipfunyitse SOT, igipimo cyo gufungura

ya padi nini ya nyuma ni 1: 1.1, ubugari rusange bwerekezo ya padi ntoya ni 1: 1, naho uburebure ni 1: 1.

NiguteGukoresha Ikarita ya PCB?

1. Koresha witonze.

2. Ikaramu igomba guhanagurwa mbere yo kuyikoresha.

3. Solder paste cyangwa kole itukura bizashyirwa muburyo bumwe.

4. Hindura igitutu cyo gucapa neza.

5. Gukoresha icapiro rya pasteboard.

6. Nyuma yo gukubita scraper, nibyiza guhagarara amasegonda 2 ~ 3 mbere yo kumanuka, hanyuma ugashyiraho umuvuduko wo kumanuka ntabwo byihuse.

7. Stencil igomba guhanagurwa mugihe, ibitswe neza nyuma yo kuyikoresha.

Serivisi yo gukora Stencil ya PCB ShinTech

PCB ShinTech itanga serivise zo gukora laser zitagira ibyuma.Dukora stencile ifite ubugari bwa 100 mkm, 120 mkm, 130µm, 150 mm, 180 mm, 200 mkm, 250 mm na 300 mkm.Idosiye yamakuru asabwa kugirango ikoreshwe rya laser igomba kuba irimo SMT igurisha paste layer, amakuru yerekana ibimenyetso, PCB yerekana urutonde hamwe nimiterere yinyuguti, kuburyo dushobora kugenzura impande zimbere ninyuma yamakuru, icyiciro cyibigize, nibindi.

Niba ukeneye cote nyamuneka ohereza dosiye yawe hanyuma ubazesales@pcbshintech.com.