Wakhtigan xaadirka ah, waxa dalkayga si weyn looga isticmaalaa noocyo kala duwan oo ka samaysan naxaas, kuwaas oo sifooyinkoodu yihiin sida soo socota: Noocyo ka mid ah laambadihii naxaasta lagu xidhi jiray, aqoonta looxyada naxaasta ah, iyo hababka kala soocida saqafka naxaasta ah.Guud ahaan, marka loo eego qalabka xoojinta kala duwan ee guddiga, waxaa loo qaybin karaa shan qaybood: saldhigga warqadda, saldhigga maro fiber galaas, saldhig ka kooban (CEM taxane), saldhig guddiga multi-lakab ah laminated iyo saldhig qalab gaar ah ( dhoobada, xudunta biraha. saldhig iwm).Haddii loo kala saaro si waafaqsan xabagta xabagta ee loo isticmaalo looxa, warqadda caadiga ah ee CCI.Waxaa jira: xabagta phenolic (XPC, XxxPC, FR-1, FR-2, iwm), epoxy resin (FE-3), xabagta polyesterka iyo noocyo kale.Saldhigga maro fiber galaas ah ee caadiga ah CCL wuxuu leeyahay resin epoxy (FR-4, FR-5), kaas oo hadda ah nooca ugu badan ee loo isticmaalo saldhigga maro fiber galaas ah.Intaa waxaa dheer, waxaa jira resins kale oo gaar ah (maro fiber galaas ah, fiber polyamide, dhar aan tolmo lahayn, iwm sida qalab dheeraad ah): bismaleimide resin triazine modified (BT), polyimide resin (PI) , Diphenylene ether resin (PPO), lab. anhydride imine-styrene resin (MS), xabagta polycyanate, polyolefin resin, iwm. Marka loo eego waxqabadka ololka ee CCL, waxa loo qaybin karaa laba nooc oo loox ah: olol retardant (UL94-VO, UL94-V1) iyo non- Flame retardant (UL94-HB) .Hal ama labadii sano ee la soo dhaafay, iyada oo xoogga la saaray ilaalinta deegaanka, nooc cusub oo CCL ah oo aan ku jirin bromine ayaa laga soocay CCL-da ololka, kaas oo loo yaqaan " olol cagaaran dib u dhigista CCL”.Iyadoo horumarinta degdega ah ee tignoolajiyada alaabta elektiroonigga ah, waxaa jira shuruudaha waxqabadka sare ee cCL.Sidaa darteed, laga soo bilaabo kala-soocidda waxqabadka ee CCL, waxa loo qaybiyaa waxqabadka guud ee CCL, dielectric hoose CCL joogto ah, iska caabin kulayl sare CCL (guud ahaan L ee guddiga ayaa ka sarreeya 150 ° C), iyo hooseeyo ballaarinta kulaylka coefficient CCL (guud ahaan loo isticmaalo on substrates baakadaha)) iyo noocyo kale.Horumarinta iyo horumarka joogtada ah ee tignoolajiyada elektiroonigga ah, shuruudo cusub ayaa si joogto ah loogu soo bandhigaa agabka substrate-ka guddiga daabacan, taas oo kor u qaadeysa horumarka joogtada ah ee heerarka laminate ee naxaasta.Waqtigan xaadirka ah, heerarka ugu muhiimsan ee alaabta substrate waa sida soo socota
① Heerarka Qaranka: Heerarka qaranka ee dalkayga ee la xidhiidha agabka substrate-ka waxa ka mid ah GB/T4721-47221992 iyo GB4723-4725-1992.Halbeegga loogu talagalay laminates-ka naxaasta ah ee Taiwan, Shiinaha waa heerka CNS, kaas oo la sameeyay iyadoo lagu saleynayo heerka JIS ee Jabbaan waxaana la aasaasay 1983. sii deynta.
② Heerarka caalamiga ah: Halbeegga JIS ee Japan, ASTM Ameerikaan, NEMA, MIL, IPC, ANSI, UL standard, heerka British Bs, Jarmal DIN, heerka VDE, Faransiiska NFC, heerka UTE, heerka Canadian CSA, heerka Australian AS, heerka FOCT ee Midowgii Soofiyeeti hore, halbeegga caalamiga ah ee IEC, iwm.;alaab-qeybiyeyaasha PCB-ga qalabka naqshadeynta, kuwa caadiga ah iyo kuwa caadiga ah ee la isticmaalo waa: Shengyi\Kingboard\International, iwm.
PCB-ga wareegga walxaha hordhaca ah: marka loo eego heerka tayada sumadda hoose ilaa sare, waxa loo qaybiyaa sidan soo socota: 94HB-94VO-CEM-1-CEM-3-FR-4
Halbeegyada faahfaahsan iyo isticmaalku waa sida soo socota:
94HB
Baakadaha caadiga ah, oo aan dabci karin (walaxda ugu hooseeysa, feerka dhinta, looma isticmaali karo guddi koronto ahaan)
94V0: kartoonnada ololka celinaya ( feeray dhiman )
22F
: loox fiber galaas badhkiis ah oo hal dhinac ah (dhimasho feeray)
CEM-1
: looxa fiberglass ah oo hal dhinac ah (waa in kombuyuutar lagu qodaa, oo aan la feerayn)
CEM-3
: Guddi laba-geesood ah oo laba-geesood ah (marka laga reebo kartoonada laba-geesoodka ah, taas oo ah qalabka ugu hooseeya ee muraayadaha laba-geesoodka ah. Qaybaha fudud ee laba-geesoodka ah ayaa isticmaali kara alaabtan, taas oo ah 5 ~ 10 yuan / mitir labajibbaaran oo ka jaban FR-4)
FR-4:
Loox laba-geesood ah oo fiberglass ah
1. Kala soocida guryaha dab-demiska waxa loo qaybin karaa afar nooc: 94VO-V-1-V-2-94HB
2. Diyaarinta: 1080=0.0712mm, 2116=0.1143mm, 7628=0.1778mm
3. FR4 CEM-3 dhamaantood waxay matalaan loox, fr4 waa loox fiber galaas ah, iyo cem3 waa substrate isku jira
4. Halogen-free waxaa loola jeedaa substrate-ka aan ku jirin halogens (cunsurka sida fluorine, bromine, iodine, iwm.), sababtoo ah bromine waxay soo saari doontaa gaas sun ah marka la gubo, taas oo u baahan ilaalinta deegaanka.
5. Tg waa heerkulka kala-guurka dhalada, kaas oo ah barta dhalaalka.
6. Guddidu waa inay noqotaa olol u adkaysta, ma guban karto heerkul gaar ah, kaliya way jilicsanaan kartaa.Barta heerkulka wakhtigan waxa loo yaqaan heerkulka kala-guurka dhalada (Tg point), qiimuhu waxa uu la xidhiidha cimri dhererka guddiga PCB.
Waa maxay sare Tg?Guddiga wareegga PCB iyo faa'iidooyinka isticmaalka sare ee Tg PCB: Marka heerkulka sare ee Tg wareegga guddiga daabacan uu kor u kaco ilaa xad gaar ah, substrate-ka bedeli doona "xaalad galaaska" oo loo beddelo "xaalad caag", iyo heerkulka waqtigan waxaa loo yaqaan. heerkulka kala guurka galaas guddiga (Tg).Taasi waa, Tg waa heerkulka ugu sarreeya (° C.) kaas oo substrate-ku uu yahay mid adag.Taasi waa in la yiraahdo, qalabka caadiga ah ee PCB-ga ayaa sii wadi doona inay jilicsanaadaan, qallafsan yihiin, dhalaalayaan iyo ifafaale kale oo hoos yimaada heerkulka sare, isla mar ahaantaana, waxay sidoo kale muujin doontaa hoos u dhac weyn oo ku yimaada guryaha farsamada iyo korantada, taas oo saameyn doonta nolosha adeegga alaabta.Guud ahaan, looxa Tg waa 130 Ka sarreeya ℃, Tg sare ayaa guud ahaan ka weyn 170 ° C, Tg dhexdhexaad ah ayaa ka weyn 150 ° C;sida caadiga ah looxa daabacan ee PCB ee leh Tg ≥ 170°C waxa loo yaqaan sabuur sare oo daabacan oo Tg ah;Tg ee substrate-ka ayaa la kordhiyaa, iyo caabbinta kulaylka ee guddiga daabacan, Tilmaamaha sida caabbinta qoyaanka, caabbinta kiimikada, iyo xasiloonida dhamaantood waa la wanaajiyey oo la wanaajiyey. Qiimaha TG sare, ayaa ka sii fiicnaanaya caabbinta heerkulka guddiga, gaar ahaan. habka-free-lead-ka, waxaa jira codsiyo badan oo Tg sare ah;sare Tg waxa loola jeedaa iska caabbinta kulaylka sare.Iyada oo horumarka degdega ah ee warshadaha elektiroonigga ah, gaar ahaan alaabada elektiroonigga ah ee ay matalaan kombuyuutarrada, ayaa horumarinaya xagga shaqeynta sare iyo lakabyo badan oo badan, taas oo u baahan iska caabin kulaylka sare leh ee agabka substrate PCB sida shardi ah.Soo ifbaxa iyo horumarinta tignoolajiyada kor u qaadista cufnaanta sare ee ay matalaan SMT iyo CMT ayaa PCB ka dhigay mid aad iyo aad u badan oo aan kala go 'lahayn taageerada kulaylka sare ee substrate marka loo eego dalool yar, xariiq ganaax ah, iyo khafiifin.Sidaa darteed, farqiga u dhexeeya FR-4 guud iyo Tg sare: heerkulka sare, gaar ahaan kulaylka ka dib nuugista qoyaanka, xoogga farsamada, xasilloonida cabbirka, dhejinta, nuugista biyaha, kala-baxa kulaylka, ballaarinta kulaylka, iwm. Inta u dhaxaysa labada xaaladood, iyo alaabada Tg sare ayaa iska cad inay ka fiican yihiin qalabka caadiga ah ee guddiga wareegga PCB.
Waqtiga boostada: Abriil-26-2023