-Daga pcb duniya,
Ƙunƙarar kayan, wanda kuma aka sani da jinkirin wuta, kashe kai, juriya na harshen wuta, juriya na wuta, juriya na wuta, flammability da sauran konewa, shine kimanta ikon kayan don tsayayya da konewa.
Samfurin kayan wuta yana ƙonewa tare da harshen wuta wanda ya dace da bukatun, kuma an cire harshen wuta bayan ƙayyadadden lokaci.Ana kimanta matakin flammability bisa ga matakin konewar samfurin.Akwai matakai guda uku.Hanyar gwajin kwance na samfurin an raba zuwa FH1, FH2, FH3 matakin uku, hanyar gwajin tsaye ta raba zuwa FV0, FV1, VF2.
An raba katakon PCB mai ƙarfi zuwa allon HB da allon V0.
Takardar HB tana da ƙarancin jinkirin harshen wuta kuma galibi ana amfani da ita don alluna mai gefe ɗaya.
Kwamitin VO yana da babban jinkirin harshen wuta kuma ana amfani da shi galibi a cikin allunan gefe biyu da Multi-Layer.
Irin wannan kwamiti na PCB wanda ya dace da buƙatun ƙimar wuta na V-1 ya zama hukumar FR-4.
V-0, V-1, da V-2 maki ne masu hana wuta.
Dole ne allon kewayawa ya zama mai jurewa harshen wuta, ba zai iya ƙonewa a wani yanayin zafi ba, amma ana iya yin laushi kawai.Matsayin zafin jiki a wannan lokacin ana kiransa zazzabin canjin gilashin (Tg point), kuma wannan ƙimar tana da alaƙa da daidaiton girman allon PCB.
Menene babban Tg PCB da'ira da kuma fa'idodin yin amfani da babban Tg PCB?
Lokacin da yawan zafin jiki na babban Tg da aka buga ya tashi zuwa wani yanki, substrate zai canza daga "jihar gilashi" zuwa "jihar roba".Yanayin zafin jiki a wannan lokacin ana kiransa yanayin canjin gilashin (Tg) na allo.A wasu kalmomi, Tg shine mafi girman zafin jiki wanda substrate ke kula da rigidity.
Menene takamaiman nau'ikan allon PCB?
An raba ta da matakin daraja daga ƙasa zuwa sama kamar haka:
94HB - 94VO - 22F - CEM-1 - CEM-3 - FR-4
Cikakkun bayanai sune kamar haka:
94HB: kwali na yau da kullun, ba mai hana wuta ba (mafi ƙanƙanta kayan sawa, mutuƙar naushi, ba za a iya amfani da shi azaman hukumar samar da wutar lantarki ba)
94V0: Katin Katin Harshen Harshe (Die Punching)
22F: Gilashin fiber gilashi mai gefe guda ɗaya (mutuwa)
CEM-1: Gilashin fiberglass mai gefe guda ɗaya (hakowa na kwamfuta ya zama dole, ba mutuƙar bugawa ba)
CEM-3: Fuskar fiber gilashin rabin gilashin fuska biyu (sai dai kwali mai gefe biyu, shine mafi ƙarancin ƙarshen abu na katako mai gefe biyu, mai sauƙi.
Ana iya amfani da wannan kayan don bangarori biyu, wanda shine 5 ~ 10 yuan / murabba'in mita mai rahusa fiye da FR-4)
FR-4: Gilashin fiberglass mai gefe biyu
Dole ne allon kewayawa ya zama mai jurewa harshen wuta, ba zai iya ƙonewa a wani yanayin zafi ba, amma ana iya yin laushi kawai.Matsayin zafin jiki a wannan lokacin ana kiransa zazzabin canjin gilashin (Tg point), kuma wannan ƙimar tana da alaƙa da daidaiton girman allon PCB.
Mene ne babban Tg PCB da'ira da kuma fa'idodin yin amfani da babban Tg PCB.Lokacin da yawan zafin jiki ya tashi zuwa wani yanki, substrate zai canza daga "jihar gilashi" zuwa "jihar roba".
Yanayin zafin jiki a lokacin ana kiransa da gilashin canjin zafin jiki (Tg) na farantin.A wasu kalmomi, Tg shine mafi girman zafin jiki (°C) a cikin abin da substrate ke kula da rashin ƙarfi.Wato, talakawa PCB substrate kayan ba kawai samar da softening, nakasawa, narkewa da sauran abubuwan mamaki a high yanayin zafi, amma kuma nuna wani kaifi ƙi a inji da lantarki halaye (Ina ganin ba ka so ka ga rarrabuwa na PCB allon. kuma duba wannan yanayin a cikin samfuran ku).
Farantin Tg na gabaɗaya ya fi digiri 130, babban Tg gabaɗaya ya fi digiri 170, kuma matsakaicin Tg yana kusan fiye da digiri 150.
Yawancin allon PCB da aka buga tare da Tg ≥ 170 ° C ana kiran babban allon buga Tg.
Yayin da Tg na substrate ya karu, ƙarfin zafi, juriya na danshi, juriya na sinadarai, kwanciyar hankali da sauran halaye na allon buga za a inganta da inganta.Mafi girman darajar TG, mafi kyawun juriya na zafin jiki na jirgi, musamman a cikin tsarin da ba shi da gubar, inda manyan aikace-aikacen Tg suka fi yawa.
High Tg yana nufin juriya mai zafi.Tare da saurin haɓaka masana'antar lantarki, musamman samfuran lantarki waɗanda ke wakilta ta kwamfutoci, haɓaka babban aiki da manyan multilayers yana buƙatar juriya mai zafi na kayan aikin PCB azaman garanti mai mahimmanci.Haɓaka da haɓaka fasahar haɓaka haɓakar haɓakar haɓakar haɓakar haɓakawa da SMT da CMT ke wakilta sun sanya PCBs daɗaɗawa ba za su iya rabuwa da goyan bayan babban juriya na juriya ba dangane da ƙaramin buɗaɗɗen buɗewa, wayoyi masu kyau, da bakin ciki.
Saboda haka, bambanci tsakanin janar FR-4 da babban Tg FR-4: yana cikin yanayin zafi, musamman bayan shayar da danshi.
A ƙarƙashin zafi, akwai bambance-bambance a cikin ƙarfin injina, kwanciyar hankali mai girma, mannewa, shayar da ruwa, bazuwar thermal, da haɓakar thermal na kayan.Babban samfuran Tg a bayyane ya fi kyau fiye da kayan aikin PCB na yau da kullun.
A cikin 'yan shekarun nan, adadin abokan ciniki da ke buƙatar samar da manyan allon buga Tg ya karu kowace shekara.
Tare da haɓakawa da ci gaba da ci gaba na fasahar lantarki, ana sa sabbin buƙatu akai-akai don kayan aikin da'irar da aka buga, ta haka ne ke haɓaka ci gaba da haɓaka ka'idodin laminate na jan karfe.A halin yanzu, babban ma'auni na kayan aikin substrate sune kamar haka.
① Ma'auni na ƙasa A halin yanzu, ƙa'idodin ƙasa na ƙasa don rarraba kayan PCB don abubuwan da suka haɗa da GB/
T4721-47221992 da GB4723-4725-1992, ma'aunin laminate na jan karfe a Taiwan, China sune ma'auni na CNS, waɗanda suka dogara da ma'aunin JI na Japan kuma an ba su a cikin 1983.
②Sauran ma'auni na ƙasa sun haɗa da: Matsayin JIS na Japan, ASTM na Amurka, NEMA, MIL, IPC, ANSI, ka'idodin UL, ƙa'idodin Bs na Biritaniya, ka'idodin DIN Jamus da VDE, ƙimar NFC da UTE na Faransa, da Ka'idodin CSA na Kanada, Matsayin AS Australia, tsohon. Ma'aunin FOCT na Tarayyar Soviet, ma'aunin IEC na duniya, da sauransu.
Masu samar da kayan ƙirar PCB na asali sun zama gama gari kuma ana amfani da su: Shengyi \ Jiantao \ International, da sauransu.
Karɓa da takaddun: protel autocad powerpcb orcad gerber ko ainihin allo kwafin allo, da sauransu.
● Nau'in takarda: CEM-1, CEM-3 FR4, manyan kayan TG;
● Matsakaicin girman allo: 600mm * 700mm (24000mil * 27500mil)
● Kauri na allo: 0.4mm-4.0mm (15.75mil-157.5mil)
● Mafi girman adadin matakan sarrafawa: 16Layers
● Kauri mai rufin ƙarfe: 0.5-4.0 (oz)
● Haƙuri na kauri da aka gama: +/- 0.1mm(4mil)
● Samar da juriya mai girma: niƙa na kwamfuta: 0.15mm (mil 6) mutun farantin naushi: 0.10mm (4mil)
● Mafi ƙarancin nisa / tazarar layi: 0.1mm (4mil) Ikon sarrafa nisa na layi: <+-20%
● Matsakaicin diamita na ƙãre samfurin: 0.25mm (mil 10)
Matsakaicin diamita na rami na ƙãre samfurin: 0.9mm (mil 35)
Haƙurin ramin da aka gama: PTH: + -0.075mm(3mil)
NPTH: + -0.05mm (mil)
● Ƙarfin bangon rami na jan karfe: 18-25um (0.71-0.99mil)
● Mafi ƙarancin tazarar facin SMT: 0.15mm (mil 6)
● Rufin saman: zinari na nutsewa da sinadarai, fesa tin, zinari mai launin nickel (ruwa / gwal mai laushi), allon siliki shuɗi mai manne, da sauransu.
● Kauri na abin rufe fuska a kan allo: 10-30μm (0.4-1.2mil)
● Ƙarfin kwasfa: 1.5N/mm (59N/mil)
● Taurin abin rufe fuska:>5H
● Solder mask toshe damar rami: 0.3-0.8mm (12mil-30mil)
● Dielectric akai-akai: ε= 2.1-10.0
● Juriya mai juriya: 10KΩ-20MΩ
● Ƙunƙarar yanayi: 60 ohm± 10%
● girgiza mai zafi: 288 ℃, 10 sec
● Warpage na gama allo: <0.7%
● Aikace-aikacen samfur: kayan sadarwa, kayan lantarki na mota, kayan aiki, tsarin sakawa na duniya, kwamfuta, MP4, wutar lantarki, kayan gida, da dai sauransu.