1. Babban tsari

Browning → bude PP → pre-shirya → shimfidawa → latsa-fit → dismantle → tsari →FQＣ →IQＣ → fakitin

2. Faranti na musamman

(1) Babban tg pcb abu

Tare da haɓaka masana'antar bayanan lantarki, filayen aikace-aikacen bugu alluna sun zama mafi fadi da fadi, kuma abubuwan da ake buƙata don yin aikin kwalayen da aka buga sun zama ƙarami.Bugu da ƙari ga aikin na'urorin PCB na al'ada, ana kuma buƙatar na'urorin PCB don yin aiki a tsaye a yanayin zafi.Gabaɗaya, Farashin FR-4 ba za su iya yin aiki da ƙarfi a cikin yanayin zafin jiki ba saboda yanayin canjin gilashin su (Tg) yana ƙasa da 150 ° C.

Gabatar da wani ɓangare na trifunctional da polyfunctional epoxy guduro ko gabatar da wani ɓangare na phenolic epoxy guduro a cikin tsarin guduro na janar FR-4 don ƙara Tg daga 125 ~ 130℃ zuwa 160 ~ 200℃, abin da ake kira High Tg.High Tg iya muhimmanci inganta thermal fadada kudi na jirgin a cikin Z-axis shugabanci (bisa ga dacewa statistics, da Z-axis CTE na talakawa FR-4 ne 4.2 a lokacin dumama tsari na 30 zuwa 260 ℃, yayin da FR- 4 na High Tg shine kawai 1.8), Don haka don tabbatar da ingantaccen aikin lantarki ta hanyar ramuka tsakanin yadudduka na allon multilayer;

(2) Kayayyakin kare muhalli

Laminat ɗin tagulla masu dacewa da muhalli ba za su samar da abubuwa masu cutarwa ga jikin ɗan adam da muhalli ba yayin aikin samarwa, sarrafawa, aikace-aikace, wuta, da zubar (sake amfani da su, binnewa, da konewa).Takamammen bayyanar da su sune kamar haka:

① Ba ya ƙunshi halogen, antimony, jan phosphorus, da sauransu.

② Baya ƙunshi ƙarfe masu nauyi kamar gubar, mercury, chromium, da cadmium.

③ Wutar wuta ta kai matakin UL94 V-0 ko matakin V-1 (FR-4).

④ Aikin gabaɗaya ya dace da ma'aunin IPC-4101A.

⑤ Ana buƙatar tanadin makamashi da sake yin amfani da su.

3. Oxidation na allo na ciki (browning ko baƙar fata):

Babban allon yana buƙatar oxidized da tsaftacewa kuma a bushe kafin a iya danna shi.Yana da ayyuka guda biyu:

a.Ƙara sararin samaniya, ƙarfafa mannewa (Maɗaukaki) ko gyarawa (Bondabity) tsakanin PP da jan karfe.

b.Ana samar da wani maɗauri mai yawa (Passivation) akan saman dandarar tagulla don hana tasirin amines a cikin mannen ruwa akan saman jan karfe a yanayin zafi mai yawa.

4. Fim (Prepreg):

(1) Abun da ke ciki: Taswirar da ke kunshe da gilashin fiber gilashi da resin da aka warkar da su, wanda aka warkar da shi a babban zafin jiki, kuma shine kayan manne don allunan multilayer;

(2) Nau'in: Akwai nau'ikan PP guda 106, 1080, 2116 da 7628 da aka saba amfani da su;

(3) Akwai manyan kaddarorin jiki guda uku: Gudun Gudun Gudun Gudun, Abun Guda, da Lokacin Gel.

5. Zane tsarin latsawa:

(1) An fi son cibiya mai bakin ciki tare da kauri mafi girma (mafi kyawun kwanciyar hankali);

(2) An fi son pp mai ƙarancin farashi (don nau'in zane iri ɗaya na gilashin prepreg, abun ciki na guduro da gaske baya shafar farashin);

(3) An fi son tsarin ma'auni;

(4) Kauri na dielectric Layer>kauri na ciki tagulla tsare × 2;

(5) An haramta yin amfani da prepreg tare da ƙananan resin abun ciki tsakanin 1-2 yadudduka da n-1 / n yadudduka, kamar 7628 × 1 (n shine adadin yadudduka);

(6) Don 5 ko fiye da prepregs da aka shirya tare ko kauri daga cikin dielectric Layer ya fi 25 mils, sai dai na waje da na ciki yadudduka ta amfani da prepreg, tsakiyar prepreg an maye gurbinsu da wani haske allon;

(7) Lokacin da na biyu da n-1 yadudduka ne 2oz kasa jan karfe da kauri na 1-2 da n-1/n insulating yadudduka kasa da 14mil, an haramta amfani da guda prepreg, da outermost Layer bukatar. yi amfani da babban abun ciki na resin prepreg, Irin su 2116, 1080;

(8) Lokacin amfani da 1 prepreg na ciki tagulla 1oz jirgin, 1-2 yadudduka da n-1 / n yadudduka, da prepreg ya kamata a zaba tare da babban guduro abun ciki, sai dai 7628 × 1;

(9) An haramta amfani da PP guda ɗaya don allunan da ke da jan ƙarfe na ciki ≥ 3oz.Gabaɗaya, 7628 ba a amfani da shi.Dole ne a yi amfani da prepregs da yawa tare da babban abun ciki na guduro, kamar 106, 1080, 2116 ...

(10) Don allunan multilayer tare da wuraren da ba su da jan ƙarfe fiye da 3"×3" ko 1"×5", ba a amfani da prepreg gabaɗaya don zanen gado ɗaya tsakanin allunan ainihin.

6. Tsarin latsawa

a.Dokar gargajiya

Hanyar da aka saba shine don kwantar da hankali a cikin gado ɗaya.Yayin hawan zafin jiki (kimanin mintuna 8), yi amfani da 5-25PSI don tausasa manne mai gudana don fitar da kumfa a hankali a cikin littafin farantin.Bayan mintuna 8, danko na manne yana ƙara matsa lamba zuwa cikakken matsa lamba na 250PSI don matse kumfa mafi kusa da gefen, kuma ci gaba da taurare resin don tsawaita maɓalli da gadar maɓalli na gefe na mintuna 45 a wurin. high zafin jiki da kuma high matsa lamba na 170 ℃, sa'an nan kuma ajiye shi a cikin asali gado.Ana saukar da matsi na asali na kusan mintuna 15 don daidaitawa.Bayan da jirgin ya tashi daga gado, dole ne a gasa a cikin tanda a 140 ° C na tsawon sa'o'i 3-4 don ƙara tauri.

b.Canjin guduro

Tare da haɓakar allunan Layer huɗu, laminate mai yawa ya sami manyan canje-canje.Domin bin halin da ake ciki, an canza tsarin resin epoxy da sarrafa fim.Babban canji na FR-4 epoxy resin shine haɓaka abun da ke cikin hanzari da ƙara guduro phenolic ko wasu resin don kutsawa da bushe B akan zanen gilashi.-Satge epoxy resin yana da ɗan ƙara girma a cikin nauyin kwayoyin halitta, kuma ana haifar da haɗin gwiwa, wanda ya haifar da yawa da danko, wanda ya rage reactivity na wannan B-Satge zuwa C-Satge, kuma yana rage yawan gudu a babban zafin jiki da matsa lamba. ., Za'a iya ƙara lokacin jujjuyawa, don haka ya dace da hanyar samar da babban adadin latsa tare da ɗimbin yawa na manyan faranti da manyan faranti, kuma ana amfani da matsa lamba mafi girma.Bayan kammala aikin latsa, allon mai Layer huɗu yana da ƙarfi fiye da resin epoxy na gargajiya, kamar : Kwanciyar hankali, juriyar sinadarai, da juriya mai ƙarfi.

c.Hanyar latsa taro

A halin yanzu, dukkansu manyan kayan aiki ne don raba gadaje masu zafi da sanyi.Akwai aƙalla buɗaɗɗen gwangwani guda huɗu kuma har guda goma sha shida.Kusan dukkansu suna da zafi ciki da waje.Bayan minti 100-120 na zafin zafi, ana tura su da sauri a kan gado mai sanyaya lokaci guda., Gudun sanyi yana da kwanciyar hankali don kimanin 30-50min a ƙarƙashin babban matsin lamba, wato, an kammala aikin latsawa gaba ɗaya.

7. Saitin shirin latsawa

Hanyar latsawa an ƙaddara ta ainihin kayan aikin jiki na Prepreg, zafin canjin gilashi da lokacin warkewa;

(1) Lokacin warkewa, zafin canjin gilashin da adadin dumama kai tsaye yana shafar sake zagayowar latsawa;

(2) Gabaɗaya, an saita matsa lamba a cikin sashin matsa lamba zuwa 350 ± 50 PSI;