Gubashada walxaha, oo sidoo kale loo yaqaano dib-u-dhaca ololka, is-daminta, caabbinta ololka, caabbinta ololka, caabbinta dabka, ololka iyo gubashada kale, waa in la qiimeeyo awoodda walxaha si looga hortago gubashada.

Muunada walxaha guban kara waxaa lagu shiday olol buuxiyey shuruudaha, ololkuna waa la saarayaa ka dib wakhtiga la cayimay.Heerka ololka waxaa lagu qiimeeyaa iyadoo loo eegayo heerka gubashada muunadda.Waxaa jira saddex heer.Habka tijaabada jiifka ah ee muunada waxa loo qaybiyaa FH1, FH2, FH3 heerka saddexaad, habka tijaabada toosan waxa loo qaybiyaa FV0, FV1, VF2.
The adag guddiga PCB waxa loo qaybiyaa looxa HB iyo boodhka V0.

xaashida HB waxay leedahay dib u dhac holac oo hooseeya waxaana inta badan loo isticmaalaa loox-dhinac ah.Guddiga VO wuxuu leeyahay dib u dhac holac sare leh.Inta badan waxaa loo isticmaalaa looxyada laba-geesoodka ah iyo kuwa lakabka badan ee buuxiya shuruudaha qiimeynta dabka ee V-1.Noocaan guddiga PCB wuxuu noqdaa guddiga FR-4.V-0, V-1, iyo V-2 waa darajooyin dab-celis ah.

Looxa wareeggu waa inuu noqdaa mid u adkaysta ololka, kuma guban karo heerkul gaar ah, laakiin waa la jilcinayaa.Heerkulka wakhtigan waxa loo yaqaan heerkulka kala-guurka dhalada (Tg point), qiimahani waxa uu la xidhiidha xasiloonida cabbirka guddiga PCB.

Waa maxay guddiga sare ee Tg PCB iyo faa'iidooyinka isticmaalka Tg PCB sare?
Marka heerkulka boodhka sare ee daabacan ee Tg uu kor u kaco meel gaar ah, substrate-ku wuxuu ka bedeli doonaa "xaalad galaas ah" una beddelo "xaalad caag ah".Heerkulka wakhtigan waxa loo yaqaan heerkulka kala guurka galaas (Tg) ee looxa.Si kale haddii loo dhigo, Tg waa heerkulka ugu sarreeya kaas oo substrate-ku uu ilaalinayo qallafsanaanta.

Waa maxay noocyada gaarka ah ee looxyada PCB?
Waxaa loo qaybiyaa heerka fasalka min hoose ilaa sare sida soo socota:

94HB - 94VO - 22F - CEM-1 - CEM-3 - FR-4 ayaa si faahfaahsan loogu sharaxay sida soo socota: kartoonada ololka celinaya (caaryada feeraya) 22F: Looxa fiberglass badhkiis hal-dhinac ah (dhimatay feeray) CEM-1: Looxa fiberglass hal dhinac ah (waa in lagu dalooliyaa by kombuyuutar, ma dhiman feer) CEM-3: Laba-dhinac loox fiberglass (dhimatay feeray) Marka laga reebo kartoonnada laba-geesoodka ah waa walxaha ugu hooseeya ee looxyada laba-geesoodka ah.

FR-4: Looxa fiberglass laba-dhinac ah

Looxa wareeggu waa inuu noqdaa mid u adkaysta ololka, kuma guban karo heerkul gaar ah, laakiin waa la jilcinayaa.Heerkulka wakhtigan waxa loo yaqaan heerkulka kala-guurka dhalada (Tg point), qiimahani waxa uu la xidhiidha xasiloonida cabbirka guddiga PCB.

Waa maxay guddiga sare ee Tg PCB iyo faa'iidooyinka isticmaalka sare Tg PCB

Marka heerkulku kor u kaco meel gaar ah, substrate-ku wuxuu ka bedeli doonaa "glassy" ilaa "rubbery", heerkulka wakhtigan waxaa loo yaqaan heerkulka kala-guurka galaaska (Tg) ee saxanka.Si kale haddii loo dhigo, Tg waa heerkulka ugu sarreeya (°C) kaas oo substrate-ku uu ilaalinayo qallafsanaanta.

Taasi waa in la yiraahdo, qalabka caadiga ah ee PCB ma aha oo kaliya inay soo saaraan jilicsanaan, qallafsanaan, dhalaalid iyo ifafaale kale heerkulka sare, laakiin sidoo kale waxay muujinayaan hoos u dhac weyn oo ku yimaada sifooyinka farsamada iyo korantada (Waxaan u maleynayaa inaadan rabin inaad aragto kala soocida looxyada PCB oo ku arag xaaladdan alaabtaada. ).

Saxanka guud ee Tg waxa uu ka badan yahay 130 darajo, Tg-ga sare guud ahaan waxa uu ka badan yahay 170 darajo, Tg dhexdhexaad ah waxa uu ka badan yahay 150 darajo.

Caadi ahaan looxyada PCB ee daabacan ee leh Tg ≥ 170°C waxa loo yaqaan sabuuradaha daabacan ee sare ee Tg.Sida Tg ee substrate-ka kordho, caabbinta kulaylka, caabbinta qoyaanka, caabbinta kiimikada, xasiloonida iyo sifooyinka kale ee guddiga daabacan ayaa la wanaajin doonaa oo la hagaajin doonaa.Qiimaha sare ee TG, ayaa si fiican u caabbinta heerkulka guddiga, gaar ahaan habka-free-lead, halkaas oo codsiyada Tg sare ay aad u badan yihiin.

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 kombiyuutarada, horumarinta shaqeynta sare iyo multilayers sare waxay u baahan tahay caabbinta kulaylka sare ee alaabta substrate PCB sida dammaanad muhiim ah.Soo ifbaxa iyo horumarinta tignoolajiyada kor u qaadista cufnaanta sare ee ay matalaan SMT iyo CMT ayaa PCB-yada ka dhigay mid aad iyo aad u badan oo aan la kala sooci karin taageerada kulaylka sare ee substrates marka loo eego dalool yar, fiilo fiican, iyo khafiifin.

Sidaa darteed, farqiga u dhexeeya FR-4 guud iyo sare Tg FR-4: waxay ku jirtaa xaalad kulul, gaar ahaan ka dib nuugista qoyaanka.
Kulaylka hoostiisa, waxaa jira kala duwanaansho xagga xoogga farsamada, xasilloonida cabbirka, dhejinta, nuugista biyaha, kala-goynta kulaylka, iyo ballaadhinta kulaylka ee alaabta.Alaabooyinka Tg-ga sarreeya ayaa iska cad inay ka fiican yihiin qalabka caadiga ah ee PCB.Sanadihii la soo dhaafay, tirada macaamiisha u baahan soo saarista boodhadhka Tg sare ee daabacan ayaa kordhay sanadba sanadka ka dambeeya.

Horumarinta iyo horumarka joogtada ah ee tignoolajiyada elektiroonigga ah, shuruudo cusub ayaa si joogto ah loogu soo bandhigaa agabka substrate-ka ee guddiga wareegga 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 Waqtigan xaadirka ah, halbeegyada qaranka ee dalkayga ee kala soocida agabka PCB ee agabka substrate waxaa ka mid ah GB/T4721-47221992 iyo GB4723-4725-1992.Heerka laminate-ka naxaasta ah ee Taiwan, Shiinaha waa heerka CNS, kaas oo ku salaysan halbeegga JIs-ka Japan., Waxa la sii daayay 1983kii.
Heerarka kale ee qaranka waxaa ka mid ah: Heerarka JIS ee Japan, ASTM American, NEMA, MIL, IPC, ANSI, UL standards, Heerarka British Bs, Heerarka German DIN iyo VDE, heerarka NFC iyo heerka UTE ee Faransiiska, iyo Heerarka CSA Canadian, AS heerarka Australia, FOCT Heerarka Midowgii Soofiyeeti ee hore, heerarka caalamiga ah ee IEC, iwm.

Alaab-qeybiyeyaasha PCB-ga asalka ah waa kuwo caadi ah oo caadi ahaan loo isticmaalo: Shengyi \ Jiantao \ International, iwm.

● Dukumeenti la aqbalay: protel autocad powerpcb orcad gerber ama sabuurada koobiyada dhabta ah, iwm.

● Noocyada guddiga: CEM-1, CEM -3 FR4, qalabka TG sare;

● Cabbirka looxa ugu badan: 600mm*700mm (24000mil*27500mil)

● Dhumucda looxa shaqada: 0.4mm-4.0mm (15.75mil-157.5mil)

● Lakabyada farsamaynta ugu badan: 16Lakab

● Lakabka bireed ee naxaasta ah Dhumucda: 0.5-4.0 (oz)

● Dhammaystir dulqaadka dhumucda looxa: +/- 0.1mm (4mil)

● Samaynta cabbirka dulqaadka: mishiinka kombiyuutarka: 0.15mm (6mil) saxan feeray: 0.10mm (4mil)

● Ballaca xariiqda ugu yar: 0.1mm(4mil) Awoodda xakamaynta ballaca xariiqda: <+-20%

● Dhexroorka daloolka ugu yar ee alaabta la dhammeeyey: 0.25mm (10mil) Dhexroorka daloolka feerka ugu yar ee alaabta la dhammeeyey: 0.9mm (35mil) Dulqaadka dhexroorka daloolka la dhammeeyey: PTH: + -0.075mm( 3mil) NPTH : +-0.05mm (2mil)

● Dhumucdiisuna waxay dhammaatay: 18-25um (0.71-0.99mil)

● Inta ugu yar ee balastar SMT: 0.15mm (6mil)

● Dahaarka dusha sare: dahab la geliyo kiimikaad, buufin daasad ah, looxa oo dhan waa dahab nikkel-ku dahaaran (dahab biyo ah/dahab jilicsan), shaashad xariir buluug ah, iwm.

● Dhumucda maaskarada alxanka ee looxa: 10-30μm (0.4-1.2mil)

● Xoogga diirinta: 1.5N/mm (59N/mil)

● Adkeydka filimka Alxanka caabbinta: >5H

● Awoodda daloolka iska caabinta alxanka: 0.3-0.8mm (12mil-30mil)

● Dielectric joogto ah: ε= 2.1-10.0

● Iska caabbinta dahaarka: 10KΩ-20MΩ

● Caqabadda sifada: 60 ohm± 10%

● Naxdinta kulaylka: 288 ℃, 10 sekan

● Wargeeska guddiga la dhammeeyey: <0.7%

● Codsiga alaabta: qalabka isgaarsiinta, elektiroonigga baabuurta, qalabaynta, nidaamka meelaynta caalamiga ah, computer, MP4, korontada, qalabka guriga, iwm.

Marka loo eego agabka xoojinta guddiga PCB, guud ahaan waxa loo qaybiyaa noocyada soo socda:
1. Substrate warqad phenolic PCB
Sababtoo ah looxa PCB-ga noocaan ah wuxuu ka kooban yahay saxarka xaashida, saxarka alwaax, iwm, mararka qaarkood wuxuu noqdaa kartoon, looxa V0, looxa ololka celinaya iyo 94HB, iwm. Alaabta ugu muhiimsan waa xaashi saxarka alwaax ah, oo ah nooc PCB ah. lagu sameeyay cadaadiska resin phenolic.saxan.Nooca warqadda ah ma aha mid dab-damis ah, waa la feeray, waa la feeri karaa, qiimo jaban, qiimo jaban, iyo cufnaanta qaraabada hoose.Waxaan inta badan aragnaa warqadaha phenolic substrates sida XPC, FR-1, FR-2, FE-3, iwm. Iyo 94V0 waxaa iska leh xaashida ololka celisa, kaas oo aan dabcin.

2. Substrate PCB oo isku dhafan
Noocaan looxa budada ah waxaa sidoo kale loo yaqaannaa looxa budada ah, oo leh xaashida saxarka alwaax ama xaashida saxarka suufka oo ah walxo xoojin ah, iyo maro fiber galaas ah oo ah walxaha xoojinta dusha isku mar.Labada walxood waxay ka samaysan yihiin resin epoxy resin ololaya.Waxaa jira hal-dhinac-gees ah fiber-glass fiber 22F, CEM-1 iyo laba-geesood oo kala bar guddiga fiber fiber CEM-3, oo ay ku jiraan CEM-1 iyo CEM-3 yihiin kuwa ugu caansan ka kooban saldhigga naxaas laminates.

3. Glass fiber substrate PCB
Mararka qaarkood waxay sidoo kale noqotaa looxa epoxy, looxa fiber galaas, FR4, looxa fiber, iwm. Waxay isticmaashaa xabagta epoxy sida koolo iyo maro fiber galaas ah sida walxaha xoojinta.Wareegga noocaan ah wuxuu leeyahay heerkul shaqo oo sarreeya mana saameynayso deegaanka.Looxa noocaan ah waxaa badanaa lagu isticmaalaa PCB-ga laba-geesoodka ah, laakiin qiimuhu wuu ka qaalisan yahay kan isku-dhafka ah ee PCB, dhumucdiisuna waa 1.6MM.Substrate-ka noocaan ah wuxuu ku habboon yahay looxyada kala duwan ee korontada, looxyada wareegyada heerka sare ah, waxaana si weyn loogu isticmaalaa kombiyuutarada, qalabka durugsan, iyo qalabka isgaarsiinta.

FR-4

4. Kuwo kale