1. Main process

Browning→vhura PP →fanoronga → marongerwo → dzvanya-kodzera → bvisa → fomu → FQ → IQ → bhokisi

2. Mahwendefa anokosha

(1) High tg pcb zvinhu

Nekuvandudzwa kweindasitiri yeruzivo rwemagetsi, minda yekushandisa ye mapuranga akadhindwa zvave zvakafara uye zvakafara, uye zvinodiwa pakuita kwemapuranga akadhindwa zvave zvichiwedzera kusiyanisa.Pamusoro pekuita kweakajairwa PCB substrates, PCB substrates inodiwawo kushanda zvakatsiga pakupisa kwakanyanya.Kazhinji, FR-4 mapuranga haigone kushanda zvakatsiga munzvimbo dzekupisa kwepamusoro nekuti tembiricha yavo yegirazi (Tg) iri pasi pe150°C.

Kuunza chikamu chetrifunctional uye polyfunctional epoxy resin kana kuunza chikamu che phenolic epoxy resin mune resin kugadzirwa kwe general FR-4 board kuwedzera Tg kubva 125 ~ 130 ℃ kusvika 160 ~ 200 ℃, iyo inonzi High Tg.Yakakwira Tg inogona kuvandudza zvakanyanya chiyero chekuwedzera kwekupisa kwebhodhi munzira yeZ-axis (maererano nehuwandu hunoenderana, iyo Z-axis CTE yeyakajairwa FR-4 ndeye 4.2 panguva yekudziya kwe30 kusvika 260 ℃, nepo FR- 4 yePamusoro Tg ingori 1.8), Kuti unyatso kuvimbisa kushanda kwemagetsi kweiyo kuburikidza nemaburi pakati pematanho e-multilayer board;

(2) Zvishandiso zvekuchengetedza zvakatipoteredza

Mhangura-inoshamwaridzana nemhangura yakapfeka laminates haizobudisi zvinhu zvinokuvadza kumuviri wemunhu uye zvakatipoteredza panguva yekugadzira, kugadzirisa, kushandiswa, moto, uye kuraswa (kudzokorodza, kuviga, uye kupisa).Iwo chaiwo maratidziro ndeaya anotevera:

① Haina halogen, antimony, tsvuku phosphorus, nezvimwe.

② Haina simbi dzinorema se lead, mercury, chromium, uye cadmium.

③ Kupisa kunosvika UL94 V-0 level kana V-1 level (FR-4).

④ Kuita kwakawanda kunosangana neIPC-4101A chiyero.

⑤ Kuchengetedza magetsi uye kudzokorodza kunodiwa.

3. Oxidation yemukati layer board (browning or blackening):

Iyo core board inoda kuve oxidized uye kucheneswa uye kuomeswa isati yagona kudzvanywa.Ine mabasa maviri:

a.Wedzera nzvimbo yepamusoro, simbisa kunamatira (Adhension) kana kugadzirisa (Bondabity) pakati pePP uye pamusoro pemhangura.

b.A dense passivation layer (Passivation) inogadzirwa pamusoro pemhangura isina chinhu kudzivirira pesvedzero yemamines mune yemvura glue pamusoro pemhangura pakupisa kwakanyanya.

4. Firimu (Prepreg):

(1) Maumbirwo: Pepa rinoumbwa negirazi fiber jira uye semi-cured resin, iyo inorapwa pakupisa kwakanyanya, uye ndiyo inonamira zvinhu zvemapuranga akawanda;

(2) Rudzi: Kune 106, 1080, 2116 uye 7628 marudzi einowanzoshandiswa PP;

(3) Pane zvinhu zvitatu zvakakosha zvemuviri: Resin Flow, Resin Content, uye Gel Nguva.

5. Dhizaini yekutsikirira chimiro:

(1) Nheyo yakatetepa ine ukobvu hombe inodiwa (zvinei zviri nani dimensional kugadzikana);

(2) Iyo yakaderera mutengo pp inosarudzwa (yeiyo yakafanana girazi jira remhando prepreg, iyo resin yemukati haina kukanganisa mutengo);

(3) Symmetrical chimiro chinosarudzwa;

(4) Ukobvu hwe dielectric layer> kukora kwemukati mhangura foil×2;

(5) Inorambidzwa kushandisa prepreg neine low resin content pakati pe 1-2 layers uye n-1 / n zvidimbu, zvakadai se7628 × 1 (n nhamba yezvikamu);

(6) Kune 5 kana kupfuura prepregs yakarongwa pamwe chete kana kukora kwedielectric layer yakakura kupfuura 25 mils, kunze kweiyo yekunze uye yemukati-kati maseru uchishandisa prepreg, yepakati prepreg inotsiviwa nechiedza bhodhi;

(7) Kana yechipiri uye n-1 maseru ari 2oz pasi mhangura uye ukobvu hwe1-2 uye n-1/n insulating layers iri pasi pe14mil, zvinorambidzwa kushandisa single prepreg, uye yekunze layer inoda shandisa high resin content prepreg , Zvakadai se2116, 1080;

(8) Paunenge uchishandisa 1 prepreg yemukati mhangura 1oz board, 1-2 layers uye n-1/n layers, prepreg inofanira kusarudzwa nepamusoro resin content, kunze kwe7628 × 1;

(9) Inorambidzwa kushandisa PP imwe chete yemapuranga ane mukati memhangura ≥ 3oz.Kazhinji, 7628 haisi kushandiswa.Multiple prepregs ane yakakwira resin yemukati inofanirwa kushandiswa, senge 106, 1080, 2116 ...

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6. Kutsikirira

a.Mutemo wechivanhu

Iyo yakajairika nzira ndeyekutonhora kumusoro uye pasi mumubhedha mumwe.Munguva yekukwira kwekushisa (anenge maminetsi masere), shandisa 5-25PSI kupfavisa glue inoyerera kuti zvishoma nezvishoma udzinge mabhuru ari mubhuku replate.Mushure memaminitsi masere, viscosity yeglue yave Wedzera kudzvanywa kuzere kudzvanywa kwe250PSI kusvina mabhuru ari padyo nemupendero, uye ramba uchiomesa resin kuti uwedzere kiyi uye bhiriji kiyi yepadivi kwemaminitsi makumi mana nemashanu. tembiricha yepamusoro uye kudzvanywa kwe170 ℃, wozoichengeta mumubhedha wekutanga.Kudzvinyirirwa kwepakutanga kunodzikiswa kweanenge maminetsi gumi nemashanu ekudzikamisa.Mushure mokunge bhodhi ichibva pamubhedha, inofanira kubikwa muchoto pa 140 ° C kwemaawa 3-4 kuti iwedzere kuoma.

b.Kuchinja kwe resin

Nekuwedzera kwemapuranga mana, iyo yakawanda-layer laminate yakachinja zvikuru.Kuti uenderane nemamiriro ezvinhu, iyo epoxy resin formula uye firimu kugadzirisa zvakashandurwa zvakare.Shanduko huru yeFR-4 epoxy resin ndeyekuwedzera kuumbwa kweaccelerator uye kuwedzera phenolic resin kana mamwe maresini ekupinda nekuoma B pajira regirazi.-Satge epoxy resin ine kuwedzera kudiki kwehuremu hwema molecular, uye mabhondi eparutivi anogadzirwa, zvichikonzera kuwanda uye viscosity, izvo zvinoderedza reactivity yeiyi B-Satge kuenda kuC-Satge, uye inoderedza kuyerera pakupisa kwepamusoro uye kumanikidza kwakanyanya. ., Nguva yekushandura inogona kuwedzerwa, saka yakakodzera nzira yekugadzira yenhamba yakawanda yezvinyorwa zvine masheji akawanda epamusoro uye mahwendefa makuru, uye kushandiswa kwepamusoro kunoshandiswa.Mushure mekupedzwa kwekutsikirirwa, iyo mana-layer board ine simba riri nani pane yechinyakare epoxy resin, senge: Dimensional kugadzikana, makemikari kuramba, uye solvent kuramba.

c.Mass pressing method

Parizvino, ese midziyo mikuru yekuparadzanisa mibhedha inopisa uye inotonhora.Pane mazaruro angangoita mana uye anosvika gumi nematanhatu.Anenge ose ari kupisa mukati nokubuda.Mushure me100-120 maminetsi ekupisa kwekupisa, vanokurumidza kusundirwa pamubhedha wekutonhora panguva imwe chete., Kutsikirira kunotonhora kwakagadzikana kweinenge 30-50min pasi pekumanikidzwa kwakanyanya, ndiko kuti, iyo yose yekutsikirira inopedzwa.

7. Kugadzika kwepurogiramu yekutsikirira

Iyo yekutsikirira maitiro inotarwa neiyo yakakosha yemuviri zvimiro zvePrepreg, girazi shanduko tembiricha uye nguva yekurapa;

(1) Nguva yekurapa, tembiricha yegirazi uye mwero wekudziya zvinokanganisa zvakananga kutenderera kwekutsikirira;

(2) Kazhinji, kudzvanywa muchikamu chepamusoro-soro kunoiswa ku350±50 PSI;