1. Habka ugu muhiimsan

Browning → Furan PP → diyaarinta hore → habayn →press-fit → burburin → qaab →FQＣ →IQＣ → xidhmo

2. Taarikada gaarka ah

(1) Qalabka tg pcb sare

Iyadoo horumarinta warshadaha macluumaadka elektarooniga ah, beeraha codsiga ee looxyada daabacan Waxay noqdeen kuwo ballaaran oo ballaaran, iyo shuruudaha waxqabadka looxyada daabacan ayaa noqday kuwo sii kordhaya oo kala duwan.Marka lagu daro waxqabadka substrate-ka caadiga ah ee PCB, substrate-yada PCB ayaa sidoo kale looga baahan yahay inay si degan ugu shaqeeyaan heerkul sare.Guud ahaan, FR-4 loox si xasilan uguma shaqayn karaan deegaan heerkulkiisu sarreeyo sababtoo ah heerkulkooda kala-guurka dhalada (Tg) ayaa ka hooseeya 150°C.

Soo bandhigida qayb ka mid ah xabagta epoxy trifunctional iyo polyfunctional ama soo bandhigida qayb ka mid ah phenolic epoxy resin galay qaabaynta resin ee guddiga FR-4 guud si kor loogu qaado Tg laga bilaabo 125 ~ 130 ℃ ilaa 160 ~ 200 ℃, waxa loogu yeero High Tg.High Tg wuxuu si weyn u wanaajin karaa heerka ballaarinta kulaylka ee guddiga ee jihada Z-dhidibka (sida ku cad tirakoobka la xiriira, Z-dhidibka CTE ee caadiga ah FR-4 waa 4.2 inta lagu guda jiro habka kululaynta ee 30 ilaa 260 ℃, halka FR- 4 ee High Tg waa kaliya 1.8), Si si wax ku ool ah loo dammaanad qaado waxqabadka korantada ee godad u dhexeeya lakabyada guddiga multilayer;

(2) Agabka ilaalinta deegaanka

Laminatesyada naxaasta ah ee deegaanka u saaxiibka ah ma soo saari doonaan walxaha waxyeelada u leh jidhka bini'aadamka iyo deegaanka inta lagu jiro habka wax soo saarka, habaynta, codsiga, dabka, iyo qashinka (dib u warshadaynta, aaska, iyo gubashada).Tilmaamaha gaarka ah waa sida soo socota:

① Kuma jiraan halogen, antimony, fosfooraska cas, iwm.

② Kuma jiraan biraha culus sida rasaasta, meerkuriga, chromium, iyo cadmium.

③ Dabka ololku wuxuu gaaraa heerka UL94 V-0 ama heerka V-1 (FR-4).

④ Waxqabadka guud wuxuu la kulmaa heerka IPC-4101A.

⑤ Kaydinta tamarta iyo dib u warshadaynta ayaa loo baahan yahay.

3. Oxidation ee looxa lakabka gudaha (browning ama madow):

Looxa xudunta u ah wuxuu u baahan yahay in la nadiifiyo oo la nadiifiyo ka hor inta aan la cadaadin.Waxay leedahay laba hawlood:

a.Kordhi aagga dusha sare, xooji dhejinta (Adhension) ama hagaajinta (Bondabity) ee u dhexeeya PP iyo naxaasta dusha sare.

b.Lakabka passivation cufan (Passivation) ayaa lagu soo saaraa dusha naxaasta qaawan si looga hortago saamaynta amines ee xabagta dareeraha ah ee dusha naxaasta ah heerkul sare.

4. Filimka (Prepreg):

(1) Halabuurka: xaashi ka kooban maro fiber galaas ah iyo resin simi-la daweeyay, kaas oo lagu daaweeyay heerkul sare, waana alaabta xabagta ee looxyada badan;

(2) Nooca: Waxaa jira 106, 1080, 2116 iyo 7628 noocyada PP ee caadiga ah;

(3) Waxa jira saddex astaamood oo jidheed oo waaweyn: Socodka Resin, Content Resin, iyo Gel Time.

5. Naqshadeynta qaabdhismeedka cadaadiska:

(1) Xudun dhuuban oo dhumuc weyn leh ayaa la door bidaa (xasilooni cabbir ahaan ka wanaagsan);

(2) Qiimaha jaban ee pp ayaa la door bidaa (oo ah nooca dharka galaas ee isku midka ah ee prepreg, nuxurka resin asal ahaan ma saameynayo qiimaha);

(3) Qaab-dhismeedka summeedka ayaa la door bidaa;

(4) Dhumucda lakabka dielectric> dhumucda bireed naxaasta gudaha ×2;

(5) Waa mamnuuc in la isticmaalo prepreg leh maaddooyinka resin hooseeya ee u dhexeeya 1-2 lakab iyo n-1/n lakabyada, sida 7628×1 (n waa tirada lakabyada);

(6) 5 ama in ka badan oo prepreg ah oo la isku habeeyey ama dhumucda lakabka dielectric ayaa ka weyn 25 mils, marka laga reebo lakabyada sare iyo kuwa hoose ee isticmaalaya prepreg, prepreg dhexe waxaa lagu bedelay sabuur iftiin;

(7) Marka lakabka labaad iyo n-1 ay yihiin 2oz hoose naxaas ah oo dhumucda 1-2 iyo n-1/n lakabyada insulating ka yar yahay 14mil, waxaa mamnuuc ah in la isticmaalo prepreg hal, iyo lakabka sare u baahan yahay in isticmaal prepreg ka kooban resin sare, Sida 2116, 1080;

(8) Markaad isticmaalayso 1 prepreg ee gudaha naxaasta 1oz board, 1-2 layers iyo n-1 / n layers, prepreg waa in lagu doortaa maadada sare ee resin, marka laga reebo 7628 × 1;

(9) Waa mamnuuc in loo isticmaalo hal PP loox leh naxaas gudaha ah ≥ 3oz.Guud ahaan, 7628 lama isticmaalo.Prepregs badan oo leh xabag sare waa in la isticmaalo, sida 106, 1080, 2116...

(10) Looxyada kala duwan ee leh meelaha aan naxaasta lahayn ee ka weyn 3"×3" ama 1"×5", prepreg guud ahaan looma isticmaalo go'yaal keliya oo u dhexeeya sabuuradaha asaasiga ah.

6. Habka cadaadiska

a.Xeer dhaqameed

Habka caadiga ah waa in lagu qaboojiyo oo lagu dejiyo sariir keliya.Inta lagu jiro heerkulka sare u kaca (qiyaastii 8 daqiiqo), isticmaal 5-25PSI si aad u jilciso koollada qulqulaya si tartiib tartiib ah u fogeyso xumboyada buugga saxanka.8 daqiiqo ka dib, viscosity ee koollada ayaa la kordhiyey cadaadiska si buuxda oo dhan 250PSI si aad u tuuji goobooyin u dhow cidhifka, oo sii wad in ay adkeeyaan resinka si loo kordhiyo furaha iyo buundada furaha dhinaca 45 daqiiqo at the heerkulka sare iyo cadaadiska sare ee 170 ℃, ka dibna ku hay sariirta asalka ah.Cadaadiska asalka ah ayaa hoos loo dhigayaa ilaa 15 daqiiqo si loo dejiyo.Ka dib marka looxa ka soo baxo sariirta, waa in lagu dubaa foornada 140 ° C 3-4 saacadood si loo sii adkeeyo.

b.Bedelka xabagta

Kordhinta looxyada afar-lakabka ah, lakabka lakabyada badan ayaa soo maray isbeddello waaweyn.Si loo waafajiyo xaaladda, caanaha resin epoxy iyo habaynta filimada ayaa sidoo kale la bedelay.Isbeddelka ugu weyn ee FR-4 resin epoxy waa in la kordhiyo halabuurka dardar-geliyaha oo lagu daro xabagta phenolic ama resins kale si ay u dhexgalaan oo u engegaan B ee marada galaaska.-Satge epoxy resin waxa uu leeyahay korodh yar oo ah miisaanka kelli, iyo curaarta dhinac ka mid ah ayaa abuurma, taasoo keentay in cufnaanta weyn iyo viscosity, taas oo yaraynaysaa falcelinta of this B-Satge ilaa C-Satge, iyo yaraynaysaa heerka socodka heerkulka sare iyo cadaadiska sare. ., Waqtiga beddelka waa la kordhin karaa, sidaas darteed waxay ku habboon tahay habka wax soo saarka ee tiro badan oo cadaadis ah oo leh xirmo badan oo taarikada sare iyo kuwa waaweyn, iyo cadaadis sare ayaa loo isticmaalaa.Ka dib marka la dhammeeyo saxafada, guddiga afar-lakabka ah ayaa ka xoog badan xabagta epoxy-dhaqameedka, sida: xasilloonida cabbirka, caabbinta kiimikada, iyo caabbinta dareeraha.

c.Habka cadaadiska tirada badan

Waqtigan xaadirka ah, dhammaantood waa qalab ballaaran oo lagu kala saaro sariiraha kulul iyo qabowga.Waxa jira ugu yaraan afar gasacad oo furan iyo ilaa lix iyo toban furid.Ku dhawaad ​​dhamaantood way kulushahay gudaha iyo dibadaba.Ka dib 100-120 daqiiqo ee kulaylka adag, si deg deg ah ayaa loogu riixaa sariirta qaboojinta isku mar., Cadaadiska qabowgu waa mid deggan oo ku saabsan 30-50min cadaadis sare, taas oo ah, habka cadaadiska oo dhan waa la dhammeeyaa.

7. Dejinta barnaamijka riixitaanka

Habka cadaadiska waxaa lagu go'aamiyaa sifooyinka aasaasiga ah ee jirka ee Prepreg, heerkulka kala-guurka dhalada iyo wakhtiga daaweynta;

(1) Waqtiga daaweynta, heerkulka kala-guurka dhalada iyo heerka kulaylku waxay si toos ah u saameeyaan wareegga cadaadiska;

(2) Guud ahaan, cadaadiska qaybta sare ee cadaadiska ayaa lagu wadaa 350 ± 50 PSI;