- Laga soo bilaabo pcb adduunka,
Gubashada walxaha, oo sidoo kale loo yaqaanno dib u dhigista 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.
Guddiga PCB-ga adag wuxuu u qaybsan yahay guddiga HB iyo guddiga V0.
xaashida HB waxay leedahay dib u dhac holac oo hooseeya waxaana inta badan loo isticmaalaa loox-dhinac ah.
Boodhka VO waxa uu leeyahay dib u dhac holac sare leh waxaana inta badan lagu isticmaalaa looxyo laba-geesood ah iyo kuwo lakabyo badan leh.
Nooca guddiga PCB ee buuxiya shuruudaha qiimeynta dabka ee V-1 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.Barta 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" oo loo beddelo "state caag".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
Faahfaahinta waa sida soo socota:
94HB: kartoonno caadi ah, oo aan dab-damis ahayn (walaxda heerka ugu hooseeya, feedh ku dhinta, looma isticmaali karo guddi koronto ahaan)
94V0: Kartoonka Ololka Retardant (Die Punching)
22F: loox fiber galaas badhkiis ah oo hal dhinac ah ( feeray dhinta)
CEM-1: looxa fiberglass ah oo hal dhinac ah (kumbuyuutar qodida waa lagama maarmaan, ma dhiman feer)
CEM-3: Looxa muraayadda laba-geesoodka ah (marka laga reebo kartoonnada laba-geesoodka ah, waa walxaha ugu hooseeya ee looxa laba-geeska ah, fudud
Qalabkan waxaa loo isticmaali karaa laba-geesood, kaas oo ah 5 ~ 10 yuan / mitir labajibbaaran oo ka jaban FR-4)
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.Barta 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 heerkulku kor u kaco meel gaar ah, substrate-ku wuxuu ka bedeli doonaa "xaalad galaas" una guuri doono "xaalad caag ah".
Heerkulka wakhtigaas waxa loo yaqaan heerkulka kala guurka galaas (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, xasilloonida 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 hoose ee guddiga wareegga daabacan, taas oo kor u qaadeysa horumarinta joogtada ah ee heerarka laminate-ka ee naxaasta ah.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 substrate-ka waxaa ka mid ah GB/
T4721-47221992 iyo GB4723-4725-1992, heerarka laminate naxaasta ee Taiwan, Shiinaha waa halbeegyada CNS, kuwaas oo ku salaysan heerka JIs ee Japan waxaana la soo saaray 1983.
Heerarka kale ee qaranka waxaa ka mid ah: Heerarka JIS ee Jabbaan, ASTM American, NEMA, MIL, IPC, ANSI, UL standards, Heerarka British Bs, Heerarka German DIN iyo VDE, jaangooyada NFC ee Faransiiska iyo UTE, iyo Heerarka CSA Canadian, Heerka AS Australia, kii hore Halbeegga FOCT ee Midowga Soofiyeeti, heerka caalamiga ah ee IEC, iwm.
Alaab-qeybiyeyaasha agabka naqshadeynta PCB-ga waa kuwo caadi ah oo caadi ahaan loo isticmaalo: Shengyi \ Jiantao \ International, iwm.
● Aqbal dukumeentiyada: protel autocad powerpcb orcad gerber ama guddiga koobiyada dhabta ah, iwm.
● Noocyada xaashida: 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)
● Tirada ugu badan ee lakabyada farsamaynta: 16Lakab
● Dhumucdiisuna waxay tahay lakabka naxaasta: 0.5-4.0(oz)
● Dhammaystiran dulqaadka dhumucda looxa: +/- 0.1mm(4mil)
● Samaynta cabbirka dulqaadka: mashiinka kumbuyuutarka: 0.15mm (6mil) dhinta saxan feerka: 0.10mm (4mil)
● Ballaca xariiqda ugu yar: 0.1mm (4mil) Awoodda xakamaynta ballaca laynka: <+-20%
● Dhexroorka daloolka ugu yar ee alaabta la dhammeeyey: 0.25mm (10mil)
Dhexroorka daloolka feerka ugu yar ee alaabta la dhammeeyey: 0.9mm (35mil)
Dulqaadkii la dhameeyay: 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: dahabka immersion kiimikaad, buufin qasacadaysan, dahabka nikkel-ku dahaadhay (dahab biyo/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)
● Adag ee maaskarada alxanka: >5H
● Awoodda daloolka daboolka maaskarada: 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 badeecada: qalabka isgaarsiinta, elektiroonigga baabuurta, qalabaynta, nidaamka meelaynta adduunka, kumbuyuutarka, MP4, sahayda korontada, qalabka guriga, iwm.