FPC Flex PCB Gukora: Uburyo bwo Kuvura Ubuso Intangiriro

Iyi ngingo izatanga incamake yuburyo bwo kuvura hejuru kubikorwa bya FPC Flex PCB. Duhereye ku kamaro ko gutegura ubuso kuburyo butandukanye bwo gutwikira hejuru, tuzakurikirana amakuru yingenzi kugirango tugufashe kumva no gushyira mubikorwa gahunda yo gutegura neza.

Intangiriro ：

PCBs zoroshye (Flexible Printed Circuit Board) ziragenda zamamara mu nganda zinyuranye kubera guhuza kwinshi nubushobozi bwo guhuza nuburyo bugoye. Inzira yo gutegura isura igira uruhare runini mugukora neza no kwizerwa kwiyi miyoboro yoroheje. Iyi ngingo izatanga incamake yuburyo bwo kuvura hejuru kubikorwa bya FPC Flex PCB. Duhereye ku kamaro ko gutegura ubuso kuburyo butandukanye bwo gutwikira hejuru, tuzakurikirana amakuru yingenzi kugirango tugufashe kumva no gushyira mubikorwa gahunda yo gutegura neza.

Ibirimwo:

1. Akamaro ko kuvura hejuru mubikorwa bya FPC flex PCB:

Kuvura isura nibyingenzi mubikorwa bya FPC byoroshye gukora kuko ikora intego nyinshi. Yorohereza kugurisha, ikemeza neza, kandi ikarinda inzira ziyobora okiside no kwangiza ibidukikije. Guhitamo hamwe nubuziranenge bwo kuvura hejuru bigira ingaruka kuburyo butaziguye kwizerwa no gukora muri rusange PCB.

Kurangiza isura mubikorwa bya FPC Flex PCB ikora intego zingenzi.Ubwa mbere, byorohereza kugurisha, kwemeza guhuza ibikoresho bya elegitoronike na PCB. Ubuvuzi bwo hejuru bwongerera imbaraga imbaraga zo guhuza imbaraga kandi zizewe hagati yibigize na PCB. Hatabanje gutegurwa neza kubutaka, ingingo zigurisha zirashobora gucika intege kandi zikunda kunanirwa, bikavamo imikorere idahwitse nibishobora kwangirika kumuzunguruko wose.
Ikindi kintu cyingenzi cyo gutegura ubuso mubikorwa bya FPC Flex PCB nukureba neza.FPC flex PCBs ikunze guhura cyane no guhindagurika mugihe cyakazi cyakazi, ibyo bikaba bitera guhangayika PCB nibiyigize. Ubuvuzi bwo hejuru butanga urwego rwuburinzi kugirango umenye neza ko ibice byubahirizwa neza PCB, bikarinda gutandukana cyangwa kwangirika mugihe cyo kubikora. Ibi ni ingenzi cyane mubikorwa aho guhangayikishwa no guhindagurika bisanzwe.
Byongeye kandi, kuvura hejuru birinda inzira ziyobora kuri FPC Flex PCB kwirinda okiside no kwangiza ibidukikije.Izi PCB zihora zihura nibintu bitandukanye bidukikije nkubushuhe, ihinduka ryubushyuhe hamwe nimiti. Hatabanje gutegurwa bihagije, inzira ziyobora zirashobora kwangirika mugihe, bigatera kunanirwa kwamashanyarazi no kunanirwa kwumuzunguruko. Kuvura hejuru bikora nkinzitizi, kurinda PCB ibidukikije no kongera ubuzima bwayo no kwizerwa.

2.Uburyo busanzwe bwo kuvura kubutaka bwa FPC flex PCB:

Iki gice kizaganira ku buryo burambuye uburyo bukoreshwa cyane mu kuvura ubuso mu bikoresho bya FPC byoroshye, harimo Hot Hot Solder Leveling (HASL), Electroless Nickel Immersion Gold (ENIG), Organic Solderability Preservative (OSP), Tin Immersion Tin (ISn) na electroplating (E-isahani). Buri buryo buzasobanurwa hamwe nibyiza nibibi.

Urwego rushyushye rwo kugurisha ikirere (HASL):
HASL nuburyo bukoreshwa muburyo bwo kuvura hejuru bitewe nuburyo bukora neza. Inzira ikubiyemo gutwikira hejuru yumuringa hamwe nigice cyagurishijwe, hanyuma igashyuha numwuka ushushe kugirango habeho ubuso bunoze, buringaniye. HASL itanga ubwiza buhebuje kandi irahujwe nibintu byinshi bitandukanye hamwe nuburyo bwo kugurisha. Ariko, ifite kandi imbogamizi nko kurangiza hejuru yuburinganire hamwe nibishobora kwangirika kubimenyetso byoroshye mugihe cyo gutunganya.
Amashanyarazi Nickel Immersion Zahabu (ENIG):
ENIG ni amahitamo azwi cyane mubikorwa bya flex circuit kubera imikorere yayo myiza kandi yizewe. Inzira ikubiyemo gushira urwego ruto rwa nikel hejuru yumuringa hifashishijwe imiti, hanyuma igashirwa mumuti wa electrolyte urimo ibice bya zahabu. ENIG ifite imbaraga zo kurwanya ruswa, gukwirakwiza umubyimba umwe hamwe no kugurishwa neza. Nyamara, inzira ihanitse ijyanye nibiciro hamwe nibibazo byumukara padi nibimwe mubitagenda neza.
Organic Solderability Preservative (OSP):
OSP nuburyo bwo kuvura hejuru burimo gutwikira hejuru yumuringa hamwe na firime yoroheje kugirango birinde okiside. Iyi nzira yangiza ibidukikije kuko ikuraho ibikenerwa byamabuye aremereye. OSP itanga ubuso buringaniye hamwe no kugurishwa neza, bigatuma ibera ibice byiza. Nyamara, OSP ifite igihe gito cyo kubaho, yunvikana no gukemura, kandi isaba uburyo bukwiye bwo kubika kugirango ikomeze gukora neza.
Amabati yo kwibiza (ISn):
ISn nuburyo bwo kuvura hejuru burimo kwibiza uruziga rworoshye mu bwogero bwamabati yashongeshejwe. Ubu buryo bukora amabati yoroheje hejuru yumuringa, afite solderabilité nziza, iringaniye kandi irwanya ruswa. ISn itanga ubuso bworoshye kurangiza neza nibyiza kubisabwa neza. Ariko, ifite ubushyuhe buke kandi irashobora gusaba gukoreshwa bidasanzwe kubera amabati.
Amashanyarazi (isahani):
Electroplating nuburyo busanzwe bwo kuvura mubuso bworoshye. Inzira ikubiyemo gushira icyuma hejuru yumuringa hifashishijwe amashanyarazi. Ukurikije ibyifuzo bisabwa, electroplating iraboneka muburyo butandukanye nka zahabu, ifeza, nikel cyangwa amabati. Itanga uburebure buhebuje, kugurishwa no kurwanya ruswa. Nyamara, birazimvye ugereranije nubundi buryo bwo kuvura hejuru kandi bisaba ibikoresho bigoye no kugenzura.

3.Ibyemezo byo guhitamo uburyo bwiza bwo kuvura hejuru mubikorwa bya FPC flex PCB:

Guhitamo neza neza kurangiza kumurongo wa FPC bisaba gutekereza cyane kubintu bitandukanye nko kubishyira mu bikorwa, ibidukikije, ibisabwa kugurishwa, hamwe no gukoresha neza. Iki gice kizatanga ubuyobozi ku guhitamo uburyo bukwiye bushingiye kuri ibi bitekerezo.

Menya ibyo abakiriya bakeneye:
Mbere yo gucukumbura uburyo butandukanye bwo kuvura buboneka, ni ngombwa kumva neza ibyo abakiriya bakeneye. Suzuma ibintu bikurikira:

Gusaba:
Menya porogaramu igenewe ya FPC yoroheje PCB. Ari kubikoresho bya elegitoroniki, ibinyabiziga, ubuvuzi cyangwa inganda? Buri nganda zishobora kugira ibisabwa byihariye, nko kurwanya ubushyuhe bwinshi, imiti cyangwa imihangayiko.
Ibidukikije:
Suzuma ibidukikije PCB izahura nabyo. Bizahura nubushuhe, ubushuhe, ubushyuhe bukabije cyangwa ibintu byangirika? Izi ngingo zizagira ingaruka kuburyo bwo gutegura hejuru kugirango zitange uburyo bwiza bwo kwirinda okiside, kwangirika no kwangirika.
Ibisabwa kugurishwa:
Gerageza gusesengura ibisabwa bya FPC byoroshye PCB. Ikibaho kizanyura mu kugurisha umuraba cyangwa kugarura ibicuruzwa? Uburyo butandukanye bwo kuvura bufite aho buhurira nubuhanga bwo gusudira. Uzirikanye ibi bizemeza kugurisha kwizewe hamwe no gukumira ibibazo nkibishobora kugurishwa no gufungura.

Shakisha uburyo bwo kuvura Ubuso:
Hamwe no gusobanukirwa neza ibyo abakiriya bakeneye, igihe kirageze cyo gushakisha uburyo bwo kuvura bushoboka:

Organic Solderability Preservative (OSP):
OSP numukozi uzwi cyane wo kuvura hejuru ya FPC yoroheje PCB bitewe nuburyo bukoresha neza nibiranga ibidukikije. Itanga urwego ruto rwirinda okiside kandi ikorohereza kugurisha. Ariko, OSP irashobora kuba ifite uburinzi buke kubidukikije bikaze kandi igihe gito cyo kubaho kurenza ubundi buryo.
Amashanyarazi Nickel Immersion Zahabu (ENIG):
ENIG ikoreshwa cyane mu nganda zinyuranye kubera kugurishwa kwiza, kurwanya ruswa no kureshya. Igice cya zahabu gitanga ihuza ryizewe, mugihe nikel itanga uburyo bwiza bwo kurwanya okiside no kurengera ibidukikije. Ariko, ENIG irazimvye ugereranije nubundi buryo.
Amashanyarazi akomeye ya zahabu (Zahabu ikomeye):
Zahabu ikomeye iraramba cyane kandi itanga uburyo bwiza bwo guhuza kwizerwa, bigatuma iboneka mubisabwa birimo kwinjiza inshuro nyinshi hamwe no kwambara cyane. Ariko, nuburyo buhenze cyane bwo kurangiza kandi ntibishobora gukenerwa kuri buri porogaramu.
Amashanyarazi Nickel Amashanyarazi Palladium Immersion Zahabu (ENEPIG):
ENEPIG nigikorwa cyimikorere myinshi yo kuvura ikwiranye nibisabwa bitandukanye. Ihuza ibyiza bya nikel na zahabu hamwe ninyungu ziyongereye kurwego rwa palladium rwagati, rutanga insinga nziza kandi irwanya ruswa. Ariko, ENEPIG ikunda kuba ihenze kandi igoye gutunganya.

4.Icyerekezo Cyuzuye Intambwe ku ntambwe yo kuyobora inzira yo gutegura Ubuso mubikorwa bya FPC flex PCB:

Kugirango ushire mubikorwa neza gahunda yo gutegura ubuso, ni ngombwa gukurikiza inzira itunganijwe. Iki gice kizatanga ibisobanuro birambuye intambwe-ku-ntambwe ikubiyemo uburyo bwo kwitegura, gusukura imiti, gukoresha flux, gutwikira hejuru hamwe na nyuma yo kuvurwa. Buri ntambwe isobanuwe neza, yerekana tekiniki zijyanye nibikorwa byiza.

Intambwe ya 1: Gutunganya
Kwitegura nintambwe yambere mugutegura hejuru kandi harimo gusukura no gukuraho umwanda.
Banza ugenzure hejuru ibyangiritse, ubusembwa cyangwa ruswa. Ibi bibazo bigomba gukemurwa mbere yuko hafatwa ibindi bikorwa. Ibikurikira, koresha umwuka wugarije, umuyonga, cyangwa icyuho kugirango ukureho ibice byose bidakabije, umukungugu, cyangwa umwanda. Kubindi byinangiye byanduye, koresha ibishishwa cyangwa imiti isukura yakozwe kubikoresho byo hejuru. Menya neza ko ubuso bwumye neza nyuma yo koza, kuko ubuhehere busigaye bushobora kubangamira inzira zikurikira.
Intambwe ya 2: Isuku yimiti
Isuku yimiti ikubiyemo gukuramo ibyanduye byose bisigaye hejuru.
Hitamo imiti ikwiye yo gusukura ukurikije ibikoresho byo hejuru n'ubwoko bwanduye. Koresha isuku iringaniye hejuru kandi wemere igihe gihagije cyo guhura neza. Koresha igikarabiro cyangwa igikonjo kugirango usuzume buhoro buhoro hejuru, witondere ahantu bigoye kugera. Kwoza hejuru neza n'amazi kugirango ukureho ibisigazwa byose bisukuye. Igikorwa cyo gusukura imiti cyemeza ko ubuso bwuzuye kandi bwiteguye gutunganywa nyuma.
Intambwe ya 3: Gusaba Flux
Gukoresha flux ningirakamaro muburyo bwo gushakisha cyangwa kugurisha kuko biteza imbere neza kandi bigabanya okiside.
Hitamo ubwoko bwa flux bukwiranye nibikoresho bigomba guhuzwa nibisabwa byihariye. Koresha flux iringaniye mukarere gahuriweho, urebe neza ko ikwirakwizwa. Witondere kudakoresha flux irenze kuko ishobora gutera ibibazo byo kugurisha. Flux igomba gukoreshwa ako kanya mbere yo kugurisha cyangwa kugurisha kugirango ikomeze gukora neza.
Intambwe ya 4: Ubuso
Ubuso bwubuso bufasha kurinda ubuso ibidukikije, kurinda ruswa no kongera isura yabo.
Mbere yo gushira igifuniko, tegura ukurikije amabwiriza yabakozwe. Koresha ikote witonze ukoresheje brush, roller cyangwa sprayer, urebe neza kandi neza. Reba icyifuzo cyo gukama cyangwa gukiza igihe kiri hagati yamakoti. Kubisubizo byiza, komeza ibidukikije bikwiye nkubushyuhe nubushyuhe mugihe cyo gukira.
Intambwe ya 5: Inzira yo gutunganya nyuma
Ibikorwa nyuma yubuvuzi nibyingenzi kugirango harebwe kuramba hejuru yubuso hamwe nubwiza rusange bwubuso bwateguwe.
Igipfundikizo kimaze gukira neza, genzura ubusembwa ubwo aribwo bwose, ibituba cyangwa uburinganire. Kosora ibyo bibazo ukoresheje umusenyi cyangwa wogeje hejuru, nibiba ngombwa. Kubungabunga no kugenzura buri gihe ni ngombwa kugirango umenye ibimenyetso byose byerekana ko wambaye cyangwa byangiritse muri kote kugirango bishoboke gusanwa vuba cyangwa gukoreshwa mugihe bibaye ngombwa.

5.Kugenzura ubuziranenge no kwipimisha muri FPC flex PCB yo gutunganya hejuru yubutaka:

Kugenzura ubuziranenge no gupima ni ngombwa kugirango hamenyekane imikorere yuburyo bwo gutegura. Iki gice kizaganira ku buryo butandukanye bwo kwipimisha, harimo kugenzura amashusho, gupima adhesion, kugerageza kugurisha, no kugerageza kwizerwa, kugirango harebwe ubuziranenge no kwizerwa byakozwe na FPC Flex PCBs yakozwe.

Igenzura rigaragara:
Igenzura rigaragara nintambwe yibanze ariko yingenzi mugucunga ubuziranenge. Harimo kugenzura mu buryo bugaragara ubuso bwa PCB ku nenge iyo ari yo yose nko gushushanya, okiside cyangwa kwanduza. Iri genzura rirashobora gukoresha ibikoresho bya optique cyangwa na microscope kugirango hamenyekane ibintu byose bidasanzwe bishobora kugira ingaruka kumikorere ya PCB cyangwa kwizerwa.
Ikizamini cya Adhesion:
Igeragezwa rya Adhesion rikoreshwa mugusuzuma imbaraga zifatika hagati yo kuvura hejuru cyangwa gutwikira hamwe na substrate iri munsi. Iki kizamini cyemeza ko kurangiza bihujwe neza na PCB, bikarinda gutandukana hakiri kare cyangwa gukuramo. Ukurikije ibisabwa nibipimo byihariye, uburyo butandukanye bwo gupima adhesion burashobora gukoreshwa, nko gupima kaseti, kugerageza gushushanya cyangwa gukurura ibizamini.
Kwipimisha Solderability:
Igeragezwa rya Solderability ryerekana ubushobozi bwo kuvura hejuru kugirango byoroherezwe kugurisha. Iki kizamini cyemeza ko PCB yatunganijwe ishoboye gukora ibice bikomeye kandi byizewe bigurishwa hamwe nibikoresho bya elegitoroniki. Uburyo busanzwe bwo gupima solderability burimo kugurisha kureremba kureremba, kugurisha ibicuruzwa byagereranijwe, cyangwa gupima imipira yo kugurisha.
Ikizamini cyo kwizerwa:
Igeragezwa ryizewe risuzuma imikorere yigihe kirekire nigihe kirekire cyo kuvura hejuru ya FPC Flex PCBs mubihe bitandukanye. Iki kizamini gifasha ababikora gusuzuma PCB irwanya ubushyuhe bwikigereranyo, ubushuhe, ruswa, imihangayiko, nibindi bintu bidukikije. Kwihutisha ibizamini byubuzima hamwe nibizamini byo kwigana ibidukikije, nko gusiganwa ku magare yumuriro, gupima umunyu cyangwa gupima vibrasiya, akenshi bikoreshwa mugusuzuma kwizerwa.
Mugushira mubikorwa uburyo bunoze bwo kugenzura no kugerageza ubuziranenge, ababikora barashobora kwemeza ko FPC Flex PCBs ivurwa hejuru yubahiriza ibipimo bisabwa nibisobanuro. Izi ngamba zifasha gutahura inenge cyangwa ibitagenda neza hakiri kare mubikorwa kugirango umusaruro ukosorwe mugihe gikwiye kandi bitezimbere ubwiza bwibicuruzwa muri rusange.

6.Gukemura ibibazo byo gutegura hejuru mubikorwa bya FPC flex PCB:

Ibibazo byo kuvura hejuru birashobora kugaragara mugihe cyo gukora, bigira ingaruka kumiterere rusange no mumikorere ya FPC yoroheje PCB. Iki gice kizagaragaza ibibazo rusange byateguwe kandi bitange inama zo gukemura ibibazo kugirango tuneshe neza ibyo bibazo.

Gufata nabi:
Niba kurangiza bidahuje neza na PCB substrate, birashobora kuvamo gusiba cyangwa gukuramo. Ibi birashobora guterwa no kuba hariho ibihumanya, kutagira ubuso budahagije, cyangwa ibikorwa bidahagije. Kurwanya ibi, menya neza ko PCB isukuye neza kugirango ikureho umwanda cyangwa ibisigara mbere yo kubikora. Byongeye kandi, hindura ubuso bwubuso kandi urebe neza uburyo bukwiye bwo gukora neza, nko kuvura plasma cyangwa gukora imiti, bikoreshwa mugutezimbere.
Uburinganire butaringaniye cyangwa isahani:
Igipfundikizo kitaringaniye cyangwa isahani yububiko birashobora kuba ibisubizo byuburyo budahagije bwo kugenzura cyangwa gutandukana muburyo bukabije. Iki kibazo kigira ingaruka kumikorere no kwizerwa bya PCB. Kugira ngo ukemure iki kibazo, shiraho kandi ukurikirane ibipimo bikwiye nko gutwikira cyangwa gufata igihe, ubushyuhe hamwe no gukemura ibibazo. Witoze uburyo bukwiye bwo gutereta cyangwa gutereta mugihe cyo gutwikira cyangwa gufata isahani kugirango umenye kugabana kimwe.
Oxidation:
PCB itunganijwe neza irashobora okiside kubera guhura nubushuhe, umwuka, cyangwa ibindi bintu bitera okiside. Oxidation irashobora kuganisha ku kugurisha nabi no kugabanya imikorere rusange ya PCB. Kugira ngo ugabanye okiside, koresha uburyo bukwiye bwo kuvura nko gutwika ibinyabuzima cyangwa firime ikingira kugirango utange inzitizi irwanya ubushuhe hamwe na okiside. Koresha uburyo bwiza bwo gufata no kubika kugirango ugabanye umwuka nubushuhe.
Umwanda:
Kwanduza ubuso bwa PCB birashobora kugira ingaruka mbi ku gufatira hamwe no kugurishwa hejuru yubuso. Ibihumanya bisanzwe birimo ivumbi, amavuta, igikumwe, cyangwa ibisigisigi byakozwe mbere. Kurwanya ibi, shiraho gahunda nziza yo gukora isuku kugirango ikureho umwanda wose mbere yo gutegura hejuru. Koresha uburyo bukwiye bwo kujugunya kugirango ugabanye amaboko yambaye ubusa cyangwa andi masoko yanduye.
Ubukene bubi:
Kugurisha nabi birashobora guterwa no kubura ibikorwa byo hejuru cyangwa kwanduza hejuru ya PCB. Kugabanuka nabi birashobora kuganisha ku nenge no gusudira hamwe. Kugirango urusheho kugurishwa, menya neza uburyo bukoreshwa muburyo bwo gukora nka plasma yo kuvura cyangwa gukoresha imiti ikoreshwa mugutezimbere ubuso bwa PCB. Kandi, shyira mubikorwa gahunda nziza yo gukora isuku kugirango ukureho umwanda wose ushobora kubangamira gahunda yo gusudira.

7. Iterambere ryigihe kizaza cya FPC flex board ikora hejuru yubuvuzi:

Umwanya wubuso burangiza kuri FPC yoroheje PCBs ikomeje guhinduka kugirango ihuze ibikenewe byikoranabuhanga rigenda rikoreshwa. Iki gice kizaganira ku iterambere rishobora kubaho mu buryo bwo kuvura ibintu nk'ibikoresho bishya, tekinoroji igezweho, hamwe n'ibisubizo byangiza ibidukikije.

Iterambere rishobora kubaho mugihe kizaza cyo kuvura FPC ni ugukoresha ibikoresho bishya hamwe nibintu byongerewe imbaraga.Abashakashatsi barimo gukora ubushakashatsi ku mikoreshereze y’imyenda n’ibikoresho kugira ngo barusheho kunoza imikorere no kwizerwa bya FPC byoroshye PCBs. Kurugero, ubwikorezi bwo kwikiza burimo gukorwaho ubushakashatsi, bushobora gusana ibyangiritse cyangwa ibishushanyo byose hejuru ya PCB, bityo bikongerera igihe cyo kubaho no kuramba. Byongeye kandi, ibikoresho birimo kunoza ubushyuhe bwumuriro birashakishwa kugirango byongere ubushobozi bwa FPC bwo gukwirakwiza ubushyuhe kugirango bikore neza mubushyuhe bwo hejuru.
Irindi terambere ryigihe kizaza ni ugutezimbere tekinoroji igezweho.Uburyo bushya bwo gutwikira burimo gutegurwa kugirango butange ibisobanuro birambuye kandi bimwe kuri FPC. Ubuhanga nka Atomic Layer Deposition (ALD) na Plasma Enhanced Chemical Vapor Deposition (PECVD) butuma habaho kugenzura neza umubyimba wububiko hamwe nibigize, bigatuma habaho gukomera no gufatana. Izi tekinoroji ziteye imbere kandi zifite ubushobozi bwo kugabanya imikorere ihindagurika no kunoza imikorere muri rusange.
Mubyongeyeho, haribandwa cyane kubidukikije byangiza ibidukikije.Hamwe n’amabwiriza agenda yiyongera hamwe n’impungenge z’ibidukikije byuburyo bwa gakondo bwo gutegura ubuso, abashakashatsi barimo gushakisha ibisubizo byizewe kandi birambye. Kurugero, ibifuniko bishingiye kumazi bigenda byamamara kubera imyuka yo mu kirere ihindagurika (VOC) ugereranije n’ibishishwa biterwa na solvent. Byongeye kandi, imbaraga zirimo gukorwa mugutezimbere ibidukikije byangiza ibidukikije bidatanga uburozi bwibicuruzwa cyangwa imyanda.
Muri make,uburyo bwo kuvura hejuru bugira uruhare runini mukwemeza kwizerwa no gukora byubuyobozi bworoshye bwa FPC. Mugusobanukirwa n'akamaro ko gutegura ubuso no guhitamo uburyo bukwiye, ababikora barashobora kubyara imiyoboro ihanitse yujuje ubuziranenge yujuje ibyifuzo byinganda zitandukanye. Gushyira mu bikorwa gahunda itunganijwe yo kuvura, gukora ibizamini byo kugenzura ubuziranenge, no gukemura neza ibibazo byo kuvura hejuru bizagira uruhare mu gutsinda no kuramba kwa FPC byoroshye PCBs ku isoko.