Wopanga PCB Wopikisana

Pamene kutentha kwa gulu lapamwamba la Tg likukwera kudera linalake, gawo lapansi lidzasintha kuchokera ku "galasi state" kupita ku "rabara state", ndipo kutentha panthawiyi kumatchedwa kutentha kwa galasi (Tg) ya mbale.Mwanjira ina, Tg ndiye kutentha kwambiri (℃) komwe gawo lapansi limakhala lolimba.Ndiko kunena, wamba PCB gawo lapansi zakuthupi pa kutentha osati umabala softening, mapindikidwe, kusungunuka ndi zochitika zina, komanso amasonyeza kuchepa kwambiri mawotchi ndi magetsi katundu (Sindikuganiza kuti mukufuna kuwona mankhwala awo kuonekera choncho. ).

General Tg mbale ndi kupitirira madigiri 130, Tg mkulu nthawi zambiri kuposa madigiri 170, ndi sing'anga Tg ndi pafupifupi madigiri 150.

Nthawi zambiri, The PCB yokhala ndi Tg≥170 ℃ imatchedwa gulu lalikulu la Tg.

Tg ya gawo lapansi imawonjezeka, ndipo kukana kutentha, kukana chinyezi, kukana kwa mankhwala, kukana kukhazikika ndi makhalidwe ena a bolodi la dera lidzakonzedwa bwino ndikusintha.Kukwera kwa mtengo wa TG ndi, m'pamenenso kutentha kwa mbale kudzakhala bwino.Makamaka munjira yopanda lead, TG yapamwamba imagwiritsidwa ntchito nthawi zambiri.

High Tg imatanthauza kukana kutentha kwakukulu.Ndi chitukuko chachangu cha makampani amagetsi, makamaka mankhwala amagetsi akuimiridwa ndi makompyuta, kwa chitukuko cha ntchito mkulu, multilayer mkulu, kufunika PCB gawo lapansi zinthu apamwamba kutentha kukana monga chitsimikizo chofunika.Kuwonekera ndi chitukuko cha luso lapamwamba la kuika kachulukidwe koyimiridwa ndi SMT ndi CMT kumapangitsa PCB kudalira kwambiri chithandizo cha kutentha kwakukulu kwa gawo lapansi potengera kabowo kakang'ono, mawaya abwino ndi mtundu woonda.

Choncho, kusiyana wamba FR-4 ndi mkulu-TG FR-4 ndi kuti mu matenthedwe boma, makamaka pambuyo hygroscopic ndi kutenthedwa, mphamvu mawotchi, dimensional bata, adhesion, mayamwidwe madzi, matenthedwe kuwola, matenthedwe kukula ndi zinthu zina. zipangizo ndi zosiyana.Zogulitsa zapamwamba za Tg ndizabwinoko kuposa zida wamba za PCB.M'zaka zaposachedwa, chiwerengero cha makasitomala omwe amafunikira gulu lalikulu la Tg chawonjezeka chaka ndi chaka.