Pakalipano, pali mitundu ingapo ya laminates ovala mkuwa omwe amagwiritsidwa ntchito kwambiri m'dziko langa, ndipo makhalidwe awo ndi awa: mitundu ya laminates zovala zamkuwa, chidziwitso cha laminates zamkuwa, ndi njira zamagulu a laminates ovala mkuwa.Nthawi zambiri, malinga ndi zida zosiyanasiyana zolimbikitsira gululo, zitha kugawidwa m'magulu asanu: m'munsi mwa pepala, nsalu zamagalasi, nsalu zokhala ndi magalasi, m'munsi mwake (CEM zino), ma laminated multi-grayer board base ndi maziko apadera azinthu (ceramic, chitsulo pachimake). maziko, etc.).Ngati agawidwa molingana ndi zomatira utomoni ntchito bolodi, wamba pepala ofotokoza CCI.Pali: phenolic resin (XPC, XxxPC, FR-1, FR-2, etc.), epoxy resin (FE-3), polyester resin ndi mitundu ina.CCL wamba magalasi CHIKWANGWANI nsalu utomoni ali epoxy utomoni (FR-4, FR-5), amene panopa ntchito kwambiri mtundu wa galasi CHIKWANGWANI nsalu base.Kuonjezera apo, palinso ma resins ena apadera (nsalu za galasi, nsalu za polyamide, nsalu zopanda nsalu, ndi zina zotero monga zipangizo zowonjezera): bismaleimide modified triazine resin (BT), polyimide resin (PI) , Diphenylene etha resin (PPO), maleic anhydride imine-styrene utomoni (MS), polycyanate utomoni, polyolefin utomoni, etc. Malinga ndi lawi retardant ntchito ya CCL, zikhoza kugawidwa m'magulu awiri a matabwa: flame retardant (UL94-VO, UL94-V1) ndi sanali- flame retardant (UL94-HB) .M'zaka chimodzi kapena ziwiri zapitazi, ndikugogomezera kwambiri chitetezo cha chilengedwe, mtundu watsopano wa CCL umene ulibe bromine walekanitsidwa ndi CCL yotentha moto, yomwe ingatchedwe "lawi lobiriwira." -CCL yotsalira".Ndi chitukuko chofulumira chaukadaulo wazinthu zamagetsi, pali zofunikira zapamwamba za cCL.Choncho, kuchokera kumagulu a CCL, amagawidwa kukhala CCL, CCL yotsika kwambiri ya dielectric, CCL yotentha kwambiri (nthawi zambiri L ya bolodi ili pamwamba pa 150 ° C), ndi CCL yowonjezera yowonjezera kutentha (yomwe imagwiritsidwa ntchito pa zonyamula katundu)) ndi mitundu ina.Ndi chitukuko ndi mosalekeza luso pakompyuta, zofunika zatsopano nthawi zonse kusindikizidwa gulu gawo lapansi zipangizo, potero kulimbikitsa chitukuko mosalekeza wa mfundo mkuwa atavala laminate.Pakali pano, mfundo zazikulu za substrate zipangizo ndi motere
① Muyezo wadziko lonse: Miyezo ya dziko langa yokhudzana ndi zinthu zapansi panthaka ikuphatikizapo GB/T4721-47221992 ndi GB4723-4725-1992.Muyezo wa copper clad laminates ku Taiwan, China ndi CNS muyezo, amene anapangidwa kutengera Japanese JIS muyezo ndipo unakhazikitsidwa mu 1983. kumasulidwa.
② Miyezo yapadziko lonse: Japan ya JIS standard, American ASTM, NEMA, MIL, IPc, ANSI, UL standard, British Bs standard, German DIN, VDE standard, French NFC, UTE standard, Canadian CSA standard, Australian standard AS, FOCT muyezo wa wakale Soviet Union, mayiko IEC muyezo, etc.;ogulitsa PCB zipangizo kapangidwe, wamba ndi ntchito ambiri ndi: Shengyi \ Kingboard \ International, etc.
PCB dera bolodi zakuthupi mawu oyamba: malinga ndi mtundu khalidwe mlingo kuchokera pansi mpaka mkulu, iwo anawagawa motere: 94HB-94VO-CEM-1-CEM-3-FR-4
Mwatsatanetsatane magawo ndi kagwiritsidwe ntchito ndi izi:
94 hb
: Makatoni wamba, osawotcha (chinthu chotsika kwambiri, nkhonya zakufa, sizingagwiritsidwe ntchito ngati bolodi lamagetsi)
94V0: makatoni oyimitsa moto (kufa kukhomerera)
22F
: Single-mbali imodzi half glass fiber board (kufa kukhomerera)
CEM-1
: bolodi la fiberglass yambali imodzi (iyenera kubowoleredwa ndi kompyuta, osakhomeredwa)
CEM-3
: Bolodi ya semi-fiberglass board (kupatula makatoni a mbali ziwiri, yomwe ili yotsika kwambiri ya mapanelo a mbali ziwiri. Mapanelo osavuta a mbali ziwiri amatha kugwiritsa ntchito zinthuzi, zomwe ndi zotchipa kuposa 5 ~ 10 yuan/square mita kuposa FR-4)
FR-4:
Mbali ziwiri za fiberglass board
1. Gulu la zinthu zoletsa moto zitha kugawidwa m'mitundu inayi: 94VO-V-1-V-2-94HB
2. Prepreg: 1080=0.0712mm, 2116=0.1143mm, 7628=0.1778mm
3. FR4 CEM-3 onse amaimira matabwa, fr4 ndi galasi fiber board, ndipo cem3 ndi gulu gawo lapansi
4. Halogen-free imatanthawuza magawo omwe alibe ma halogen (zinthu monga fluorine, bromine, ayodini, etc.), chifukwa bromine idzatulutsa mpweya woopsa ukawotchedwa, womwe umafunika ndi kuteteza chilengedwe.
5. Tg ndi kutentha kwa galasi, komwe ndi malo osungunuka.
6. Bolodi la dera liyenera kukhala lopanda moto, silingathe kutentha pa kutentha kwina, likhoza kufewetsa.Kutentha kwa nthawiyi kumatchedwa kutentha kwa galasi (Tg point), ndipo mtengowu umagwirizana ndi kulimba kwa bolodi la PCB.
Kodi high Tg ndi chiyani?PCB dera bolodi ndi ubwino wogwiritsa ntchito mkulu Tg PCB: Pamene kutentha kwa mkulu Tg osindikizidwa dera bolodi akwera kuti malo enaake, gawo lapansi lidzasintha kuchokera "galasi boma" kuti "mphira boma", ndi kutentha pa nthawi imeneyi amatchedwa. kutentha kwa galasi la board (Tg).Ndiko kuti, Tg ndiye kutentha kwambiri (° C.) kumene gawo lapansi limakhala lolimba.Ndiko kunena kuti, wamba PCB gawo lapansi zipangizo adzapitiriza kufewetsa, kupunduka, Sungunulani ndi zochitika zina pansi kutentha mkulu, ndipo pa nthawi yomweyo, izo zisonyezanso kwambiri kuchepa kwa mawotchi ndi magetsi katundu, zomwe zidzakhudza moyo utumiki wa mankhwala.Nthawi zambiri, Tg board ndi 130 Pamwamba pa ℃, Tg yapamwamba nthawi zambiri imakhala yoposa 170 ° C, ndipo Tg yapakatikati ndi yayikulu kuposa 150 ° C;kawirikawiri PCB yosindikizidwa bolodi ndi Tg ≥ 170 ° C amatchedwa mkulu Tg wosindikizidwa bolodi;Tg ya gawo lapansi ikuwonjezeka, ndipo kukana kutentha kwa bolodi losindikizidwa, Zinthu monga kukana chinyezi, kukana kwa mankhwala, ndi kukhazikika zonse zimakulitsidwa ndikuwongolera.Pamwamba pa mtengo wa TG, ndi bwino kukana kutentha kwa bolodi, makamaka munjira yopanda chitsogozo, pali ntchito zambiri za Tg yapamwamba;high Tg imatanthawuza kukana kutentha kwakukulu.Ndi chitukuko chachangu cha makampani amagetsi, makamaka mankhwala amagetsi akuimiridwa ndi makompyuta, akutukuka kwa magwiridwe mkulu ndi mkulu Mipikisano zigawo, zomwe zimafunika apamwamba kutentha kukana PCB gawo lapansi ngati chofunika.Kuwonekera ndi chitukuko cha matekinoloje okwera kwambiri omwe amaimiridwa ndi SMT ndi CMT apangitsa PCB kukhala yosiyana kwambiri ndi chithandizo cha kutentha kwakukulu kwa gawo lapansi pogwiritsira ntchito kabowo kakang'ono, mzere wabwino, ndi kupatulira.Choncho, kusiyana pakati pa ambiri FR-4 ndi mkulu Tg: pa kutentha, makamaka kutentha pambuyo mayamwidwe chinyezi, mphamvu makina, amiyeso bata, zomatira, mayamwidwe madzi, matenthedwe kuwonongeka, matenthedwe kukula, etc. wa zinthu Pali kusiyana. pakati pa zinthu ziwirizi, ndi zinthu zapamwamba za Tg mwachiwonekere zili bwino kuposa zida wamba za PCB zoyendera gawo lapansi.
Nthawi yotumiza: Apr-26-2023