Kugawikana kuchokera pansi mpaka pamwamba ndi motere:
94HB/94VO/22F/CEM-1/CEM-3/FR-4
Zambiri ndi izi:
94HB: Wamba makatoni, osati moto (zotsika kwambiri kalasi, kufa kukhomerera, sangagwiritsidwe ntchito ngati bolodi mphamvu)
94V0: makatoni oyimitsa moto (kufa kukhomerera)
22F: Single-mbali imodzi theka galasi fiber board (kufa kukhomerera)
CEM-1: bolodi la fiberglass yokhala ndi mbali imodzi (iyenera kubowoleredwa ndi kompyuta, osakhomeredwa)
CEM-3: bolodi lokhala ndi mbali ziwiri za semi-fiberglass (kupatula makatoni okhala ndi mbali ziwiri, zomwe ndizomwe zimakhala zotsika kwambiri za mapanelo a mbali ziwiri. Mapanelo osavuta am'mbali awiri atha kugwiritsa ntchito zinthuzi, zomwe ndi 5 ~ 10 yuan/square. mita yotsika mtengo kuposa FR-4)
FR-4: bolodi la fiberglass yokhala ndi mbali ziwiri
Yankho labwino kwambiri
1.c Gulu la zinthu zoletsa moto zitha kugawidwa m'mitundu inayi: 94V—0/V-1/V-2 ndi 94-HB
2. Prepreg: 1080=0.0712mm, 2116=0.1143mm, 7628=0.1778mm
3. FR4 CEM-3 ndiye bolodi, fr4 ndi galasi fiber board, cem3 ndiye gawo lapansi
4. Halogen-free imatanthawuza zinthu zoyambira zomwe zilibe halogen (fluorine, bromine, ayodini ndi zinthu zina), chifukwa bromine idzatulutsa mpweya wapoizoni ikawotchedwa, yomwe imafunika kuteteza chilengedwe.
Asanu.Tg ndi kutentha kwa galasi, ndiko kuti, malo osungunuka.
Bolodi lozungulira liyenera kukhala lopanda moto, silingatenthe ndi kutentha kwina, limatha kufewetsa.Kutentha kwa nthawiyi kumatchedwa kutentha kwa galasi (Tg point), ndipo mtengo uwu umagwirizana ndi kukhazikika kwa bolodi la PCB.
Kodi bolodi lalitali la Tg PCB ndi chiyani komanso ubwino wogwiritsa ntchito Tg PCB yapamwamba
Pamene kutentha kwapamwamba Tg matabwa osindikizidwa akukwera kudera linalake, gawo lapansi lidzasintha kuchokera ku "galasi state" kupita ku "rabara state", ndipo kutentha panthawiyi kumatchedwa kutentha kwa galasi (Tg) ya bolodi.Ndiko kuti, Tg ndiye kutentha kwambiri (° C.) kumene gawo lapansi limakhala lolimba.Ndiko kunena kuti, wamba PCB gawo lapansi zipangizo osati kufewetsa, kupunduka, kusungunula, etc. pa kutentha kwambiri, komanso kusonyeza kuchepa kwambiri mawotchi ndi magetsi katundu (Ndikuganiza kuti simukufuna kuona zinthu izi mu mankhwala anu. poyang'ana gulu la matabwa a PCB. ).Chonde osatengera zomwe zili patsambali
Nthawi zambiri, Tg ya mbaleyo imakhala yoposa madigiri 130, Tg yapamwamba nthawi zambiri imakhala yoposa madigiri 170, ndipo Tg yapakati imakhala yoposa madigiri 150.
Nthawi zambiri, matabwa osindikizidwa a PCB okhala ndi Tg ≥ 170 ° C amatchedwa mapepala apamwamba a Tg.
Tg ya gawo lapansi ikuwonjezeka, ndipo kukana kutentha, kukana chinyezi, kukana kwa mankhwala, ndi kukhazikika kwa bolodi losindikizidwa kudzakhala bwino ndikuwongolera.Kukwera kwa mtengo wa TG, kumapangitsanso kutentha kwa bolodi, makamaka mumayendedwe opanda lead, pali mapulogalamu ambiri a Tg.
High Tg imatanthauza kukana kutentha kwakukulu.Ndi chitukuko chofulumira cha makampani amagetsi, makamaka zinthu zamagetsi zomwe zimayimiridwa ndi makompyuta, zikupita patsogolo kwambiri ndi zigawo zambiri, zomwe zimafuna kukana kutentha kwambiri kwa zipangizo zapakati pa PCB monga chitsimikizo chofunikira.Kuwonekera ndi chitukuko cha matekinoloje okwera kwambiri omwe amaimiridwa ndi SMT ndi CMT apangitsa PCB kukhala yosiyana kwambiri ndi chithandizo cha kutentha kwakukulu kwa gawo lapansi pogwiritsira ntchito kabowo kakang'ono, mzere wabwino, ndi kupatulira.
Chifukwa chake, kusiyana pakati pa general FR-4 ndi mkulu Tg FR-4 ndikuti mphamvu zamakina, kukhazikika kwa mawonekedwe, kumamatira, kuyamwa kwamadzi, komanso kuwonongeka kwazinthu zomwe zili m'malo otentha, makamaka zikatenthedwa pambuyo pa kuyamwa kwa chinyezi.Pali kusiyana m'mikhalidwe yosiyanasiyana monga kukulitsa kwamafuta, ndipo zinthu zapamwamba za Tg mwachiwonekere ndizabwino kuposa zida wamba za PCB.
M'zaka zaposachedwa, chiwerengero cha makasitomala omwe amafuna mapepala apamwamba a Tg chawonjezeka chaka ndi chaka.
Chidziwitso ndi miyezo ya PCB board (2007/05/06 17:15)
Pakali pano, pali mitundu ingapo ya matabwa amkuwa omwe amagwiritsidwa ntchito kwambiri m'dziko langa, ndipo makhalidwe awo akuwonetsedwa mu tebulo ili m'munsimu: mitundu ya matabwa a mkuwa, chidziwitso cha matabwa a mkuwa.
Pali njira zambiri zogawira ma laminates amkuwa.Nthawi zambiri, malinga ndi zida zosiyanasiyana zolimbikitsira gululo, zitha kugawidwa m'munsi: pepala, tsinde lansalu la galasi fiber pcb board,
Pansi gulu (CEM mndandanda), laminated Mipikisano wosanjikiza bolodi maziko ndi zinthu m'munsi mwapadera (ceramic, zitsulo pachimake maziko, etc.) magulu asanu.Ngati agwiritsidwa ntchito ndi board _)(^$RFSW#$%T
Zomatira zosiyanasiyana za utomoni zimagawika m'magulu, CCI wamba wokhala ndi mapepala.Inde: phenolic resin (XPC, XxxPC, FR-1, FR
-2, etc.), epoxy resin (FE-3), polyester resin ndi mitundu ina.CCL wamba magalasi CHIKWANGWANI nsalu utomoni ali epoxy utomoni (FR-4, FR-5), amene panopa ntchito kwambiri mtundu wa galasi CHIKWANGWANI nsalu base.Kuonjezera apo, palinso ma resins ena apadera (nsalu za galasi, nsalu za polyamide, nsalu zopanda nsalu, ndi zina zotero monga zipangizo zowonjezera): bismaleimide modified triazine resin (BT), polyimide resin (PI) , Diphenylene etha resin (PPO), maleic anhydride imine-styrene utomoni (MS), polycyanate utomoni, polyolefin utomoni, etc. Malinga ndi lawi retardant ntchito CCL, zikhoza kugawidwa m'magulu awiri a matabwa: flame retardant (UL94-VO, UL94-V1) ndi sanali- choletsa moto (UL94-HB).M'zaka chimodzi kapena ziwiri zapitazi, ndikugogomezera kwambiri chitetezo cha chilengedwe, mtundu watsopano wa CCL womwe ulibe bromine walekanitsidwa ndi CCL yotsekemera yamoto, yomwe ingatchedwe "CCL yobiriwira yamoto-retardant".Ndi chitukuko chofulumira chaukadaulo wazinthu zamagetsi, pali zofunikira zapamwamba za cCL.Choncho, kuchokera kumagulu a CCL, amagawidwa kukhala CCL, CCL yotsika kwambiri ya dielectric, CCL yotentha kwambiri (nthawi zambiri L ya bolodi ili pamwamba pa 150 ° C), ndi CCL yowonjezera yowonjezera kutentha (yomwe imagwiritsidwa ntchito pa zonyamula katundu)) ndi mitundu ina.Ndi chitukuko ndi mosalekeza luso pakompyuta, zofunika zatsopano nthawi zonse kusindikizidwa gulu gawo lapansi zipangizo, potero kulimbikitsa chitukuko mosalekeza wa mfundo mkuwa atavala laminate.Pakalipano, miyeso yayikulu yazinthu zapansi panthaka ndi motere.
① Miyezo Yadziko Pakali pano, dziko langa ladziko lapansi la magawo azinthu zam'mbali pcb board likuphatikiza GB/T4721-47221992 ndi GB4723-4725-1992.Muyezo wa copper clad laminates ku Taiwan, China ndi CNS muyezo, amene zachokera Japanese JIs muyezo., lotulutsidwa mu 1983. gfgfgfggdgeeeejhjj
② Miyezo yayikulu ya miyezo ina yadziko ndi: JIS muyezo waku Japan, ASTM, NEMA, MIL, IPc, ANSI, UL mulingo waku United States, Bs muyezo waku United Kingdom, DIN ndi VDE muyezo waku Germany, NFC ndi UTE muyezo ya France, CSA ya Canada Miyezo, Australia ya AS muyezo, wakale Soviet Union a FOCT muyezo, mayiko IEC muyezo, etc.
Otsatsa zida zoyambirira za PCB amagwiritsidwa ntchito ndi aliyense: Shengyi\Jiantao\International, etc.
● Zolemba zovomerezeka: protel autocad powerpcb orcad gerber kapena bolodi lolimba, ndi zina zotero.
● Mtundu wa mbale: CEM-1, CEM-3 FR4, zinthu zapamwamba za TG;
● Kukula kwakukulu kwa bolodi: 600mm*700mm(24000mil*27500mil)
● Makulidwe a bolodi: 0.4mm-4.0mm(15.75mil-157.5mil)
● Magawo apamwamba kwambiri opangira: 16Layers
● makulidwe a zojambulazo za mkuwa: 0.5-4.0(oz)
● Kulekerera kwa makulidwe a mbale: +/-0.1mm(4mil)
● Kulekerera kwa kukula: Kugaya makompyuta: 0.15mm (6mil) Die stamping: 0.10mm (4mil)
● Mzere wocheperako/katalikirana kochepa: 0.1mm (4mil) Kutha kuwongolera m'lifupi: ＜+-20%
● Kubowola m'mimba mwake wa chinthu chomalizidwa: 0.25mm (10mil)
Anamaliza osachepera kukhomerera dzenje awiri: 0.9mm (35mil)
Kutha kulolerana kwa dzenje: PTH: + -0.075mm (3mil)
NPTH: + -0.05mm (2mil)
● Anamaliza dzenje khoma mkuwa makulidwe: 18-25um (0.71-0.99mil)
● Pang'ono pomwe SMT phula: 0.15mm (6mil)
● Kupaka pamwamba: golide womizidwa ndi mankhwala, HASL, golide wopakidwa nickel board (madzi/golide wofewa), guluu wabuluu wa silk screen, etc.
● Makulidwe a chigoba cha solder pa bolodi: 10-30μm (0.4-1.2mil)
● Mphamvu ya peel: 1.5N/mm (59N/mil)
● Kulimba kwa chigoba cha solder: ＞5H
● Solder resistance plugging mphamvu: 0.3-0.8mm (12mil-30mil)
● Dielectric yosasintha: ε = 2.1-10.0
● Insulation resistance: 10KΩ-20MΩ
● Kulephera kwakhalidwe: 60 ohm±10％
● Kutentha kwa kutentha: 288℃, 10 sec
● Warpage wa bolodi yomalizidwa: <0.7%
● Kugwiritsa ntchito zinthu: zida zoyankhulirana, zamagetsi zamagalimoto, zida, makina oyika padziko lonse lapansi, kompyuta, MP4, magetsi, zida zapanyumba, ndi zina zambiri.
Nthawi yotumiza: Mar-30-2023