1. Cov txheej txheem tseem ceeb

Browning → qhib PP → kev npaj ua ntej → layout → nias-fit → dismantle → form → FQ Ｃ IQ Ｃ → pob

2. Cov phaj tshwj xeeb

(1) High tg pcb khoom

Nrog rau txoj kev loj hlob ntawm cov ntaub ntawv hluav taws xob kev lag luam, daim ntawv thov teb ntawm cov ntawv luam tawm tau dhau los ua dav thiab dav, thiab cov kev xav tau ntawm kev ua haujlwm ntawm cov ntawv luam tawm tau dhau los ua ntau yam.Ntxiv rau qhov kev ua tau zoo ntawm cov pa PCB substrates, PCB substrates kuj yuav tsum tau ua haujlwm ruaj khov ntawm qhov kub thiab txias.Feem ntau, FR-4 pawg tsis tuaj yeem ua haujlwm ruaj khov hauv qhov chaw kub kub vim tias lawv cov iav hloov pauv kub (Tg) qis dua 150 ° C.

Qhia ib feem ntawm trifunctional thiab polyfunctional epoxy resin los yog qhia ib feem ntawm phenolic epoxy resin rau hauv resin formulation ntawm FR-4 board kom nce Tg ntawm 125 ~ 130 ℃ mus rau 160 ~ 200 ℃, lub thiaj li hu ua High Tg.High Tg tuaj yeem txhim kho cov thermal expansion ntawm lub rooj tsavxwm hauv Z-axis kev taw qhia (raws li cov ntaub ntawv txheeb xyuas, Z-axis CTE ntawm FR-4 zoo ib yam yog 4.2 thaum lub sij hawm cua sov ntawm 30 txog 260 ℃, thaum lub FR- 4 ntawm High Tg tsuas yog 1.8), thiaj li ua tau zoo lav qhov hluav taws xob kev ua tau zoo ntawm lub qhov ntawm cov khaubncaws sab nraud povtseg ntawm multilayer board;

(2) Cov ntaub ntawv tiv thaiv ib puag ncig

Environmentally-friendly tooj liab clad laminates yuav tsis tsim cov khoom tsim kev puas tsuaj rau tib neeg lub cev thiab ib puag ncig thaum lub sij hawm tsim, ua, thov, hluav taws, thiab pov tseg (recycling, faus, thiab hlawv).Cov manifestations tshwj xeeb yog raws li nram no:

① Tsis muaj halogen, antimony, liab phosphorus, thiab lwm yam.

② Tsis muaj cov hlau hnyav xws li txhuas, mercury, chromium, thiab cadmium.

③ Cov nplaim taws mus txog UL94 V-0 qib lossis V-1 qib (FR-4).

④ Kev ua haujlwm dav dav raws li tus qauv IPC-4101A.

⑤ Kev txuag hluav taws xob thiab rov ua dua tshiab yuav tsum tau ua.

3. Oxidation ntawm lub puab txheej board (browning los yog blackening):

Lub rooj tsavxwm tseem ceeb yuav tsum tau oxidized thiab ntxuav thiab qhuav ua ntej nws tuaj yeem nias.Nws muaj ob txoj haujlwm:

ib.Ua kom thaj chaw saum npoo, ntxiv dag zog rau qhov adhesion (Adhension) lossis fixation (Bondabitity) ntawm PP thiab nto tooj liab.

b.Ib txheej txheej ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom txheej txheej txheej txheej txheej txheej txheej (Passivation) yog tsim rau saum npoo ntawm tooj liab liab los tiv thaiv kev cuam tshuam ntawm amines hauv cov kua nplaum kua nplaum ntawm cov tooj liab ntawm qhov kub thiab txias.

4. Zaj duab xis (Prepreg):

(1) Cov Txheej Txheem: Ib daim ntawv uas muaj cov iav fiber ntau thiab cov khoom siv ib nrab kho, uas yog kho tau ntawm qhov kub thiab txias, thiab yog cov khoom siv nplaum rau cov laug cam;

(2) Hom: Muaj 106, 1080, 2116 thiab 7628 hom PP feem ntau siv;

(3) Muaj peb lub cev lub cev tseem ceeb: Resin Flow, Resin Content, thiab Gel Time.

5. Tsim cov qauv nias:

(1) Cov tub ntxhais nyias nyias nrog cov tuab loj dua yog qhov zoo dua (zoo dua qhov kev ruaj ntseg zoo dua);

(2) Tus nqi qis pp yog nyiam (rau tib lub iav ntaub hom prepreg, cov ntsiab lus resin yeej tsis cuam tshuam rau tus nqi);

(3) Symmetrical qauv yog nyiam;

(4) Thickness ntawm dielectric txheej> tuab ntawm daim ntawv tooj liab sab hauv × 2;

(5) Nws yog txwv tsis pub siv prepreg nrog cov ntsiab lus qis ntawm 1-2 txheej thiab n-1 / n txheej, xws li 7628 × 1 (n yog tus naj npawb ntawm txheej);

(6) Rau 5 los yog ntau tshaj prepregs teem ua ke los yog lub thickness ntawm lub dielectric txheej yog ntau tshaj 25 mils, tshwj tsis yog rau cov txheej sab nrauv thiab innermost siv prepreg, nruab nrab prepreg yog hloov los ntawm lub teeb board;

(7) Thaum cov txheej thib ob thiab n-1 yog 2oz hauv qab tooj liab thiab cov tuab ntawm 1-2 thiab n-1 / n insulating txheej yog tsawg dua 14mil, nws yog txwv tsis pub siv ib qho prepreg, thiab txheej txheej sab nraud yuav tsum tau siv cov ntsiab lus siab resin prepreg, xws li 2116, 1080;

(8) Thaum siv 1 prepreg rau sab hauv tooj liab 1oz board, 1-2 txheej thiab n-1 / n txheej, lub prepreg yuav tsum tau xaiv nrog cov ntsiab lus siab resin, tshwj tsis yog rau 7628 × 1;

(9) Nws yog txwv tsis pub siv ib leeg PP rau cov laug cam nrog cov tooj liab sab hauv ≥ 3oz.Feem ntau, 7628 tsis siv.Ntau prepregs nrog cov ntsiab lus siab resin yuav tsum tau siv, xws li 106, 1080, 2116 ...

(10) Rau multilayer boards nrog thaj chaw tsis muaj tooj liab ntau dua 3 "× 3" lossis 1 "× 5", prepreg feem ntau tsis siv rau ib nplooj ntawv ntawm cov ntawv tseem ceeb.

6. Cov txheej txheem nias

ib.Kev cai lij choj

Txoj hauv kev yog kom txias thiab nqis hauv ib lub txaj.Thaum lub sij hawm kub nce (kwv yees li 8 feeb), siv 5-25PSI kom soften cov kua nplaum ntws mus maj mam tshem tawm cov npuas hauv phau ntawv phaj.Tom qab 8 feeb, lub viscosity ntawm cov kua nplaum tau nce siab mus rau tag nrho lub siab ntawm 250PSI kom nyem tawm cov npuas nyob ze rau ntawm ntug, thiab txuas ntxiv ua kom tawv tawv kom txuas ntxiv tus yuam sij thiab tus choj sab nraud rau 45 feeb ntawm kub thiab kub siab ntawm 170 ℃, thiab ces cia nws nyob rau hauv lub qub txaj.Thawj lub siab yog txo qis rau li 15 feeb rau stabilization.Tom qab lub rooj tsavxwm tau tawm ntawm lub txaj, nws yuav tsum tau muab ci rau hauv qhov cub ntawm 140 ° C rau 3-4 teev kom tawv ntxiv.

b.Hloov cov resin

Nrog rau kev nce ntawm plaub-txheej boards, ntau txheej laminate tau hloov pauv zoo.Txhawm rau ua raws li qhov xwm txheej, epoxy resin formula thiab kev ua yeeb yaj kiab kuj tau hloov pauv.Qhov kev hloov loj tshaj plaws ntawm Fr-4 Epoxy Resin yog txhawm rau kom muaj kev sib xyaw ua kom muaj kev sib xyaw lossis lwm yam khoom siv Phenumed thiab qhuav B ntawm daim ntaub iav.-Saib cov kab mob Epoxy muaj qhov hnyav me ntsis hauv kev sib tsoo ntawm B-B-B-B-B-B-B-B-B-B-B-B-B-B-B-Ben) thiab txo tus nqi kub ., Lub sij hawm hloov dua siab tshiab tuaj yeem nce ntxiv, yog li nws tsim nyog rau cov txheej txheem ntau lawm ntawm cov xovxwm nrog ntau pawg ntawm cov phaj siab thiab loj, thiab siv lub siab ntau dua.Tom qab ua tiav ntawm cov xovxwm, lub rooj tsavxwm plaub-txheej txheej muaj lub zog zoo dua li cov tsoos epoxy resin, xws li: Dimensional stability, chemical resistance, and solvent resistance.

c.Cov txheej txheem nias

Tam sim no, lawv yog tag nrho cov khoom siv loj rau kev sib cais cov txaj kub thiab txias.Muaj tsawg kawg yog plaub qhov qhib tau thiab ntau li kaum rau qhov qhib.Yuav luag txhua tus ntawm lawv yog kub hauv thiab tawm.Tom qab 100-120 feeb ntawm thermal hardening, lawv raug thawb mus rau lub txaj txias rau tib lub sijhawm., Qhov txias nias yog ruaj khov rau li 30-50min nyob rau hauv kev kub siab, uas yog, tag nrho cov txheej txheem nias tiav.

7. Kev teeb tsa ntawm qhov kev pab cuam nias

Cov txheej txheem nias yog txiav txim siab los ntawm cov khoom siv lub cev ntawm Prepreg, iav hloov kub thiab lub sijhawm kho;

(1) Lub sijhawm curing, iav hloov kub thiab cua sov tus nqi ncaj qha cuam tshuam rau lub voj voog nias;

(2) Feem ntau, lub siab nyob rau hauv qhov siab-siab yog teem rau 350 ± 50 PSI;