Momwe mungapewere bolodi losindikizidwa kulimbana

1. Kuchepetsa mphamvu ya kutentha pa board stress
Popeza [kutentha] ndiye gwero lalikulu la kupsinjika kwa bolodi, bola ngati kutentha kwa ng'anjo yotsitsimula kumatsitsidwa kapena kuthamanga kwa kutentha kwa bolodi ndi kuziziritsa mu ng'anjo ya reflow kumachepetsedwa, tsamba lankhondo la PCB limatha kuchepetsedwa kwambiri.Komabe, zotsatira zina zimatha kuchitika, monga zazifupi za solder.

2. Gwiritsani ntchito mapepala apamwamba a Tg
Tg ndi kutentha kwa magalasi, ndiko kuti, kutentha kumene zinthu zimasintha kuchoka ku galasi kupita ku labala.Kutsika kwa mtengo wa Tg wa zinthuzo, bolodi imayamba kufewetsa mofulumira ikalowa mu uvuni wa reflow, ndi nthawi yomwe imatenga kuti ikhale dziko labala lofewa.Zidzakhalanso zazitali, ndipo kusinthika kwa bolodi kudzakhala koopsa kwambiri.Kugwiritsa ntchito pepala lapamwamba la Tg kumatha kukulitsa mphamvu yake yolimbana ndi kupsinjika ndi kusinthika, koma mtengo wazinthu zofananira nawonso ndiwokwera kwambiri.

3. Wonjezerani makulidwe a bolodi lozungulira
Kuti mukwaniritse makulidwe opepuka komanso ochepera azinthu zambiri zamagetsi, makulidwe a bolodi asiyidwa pa 1.0mm, 0.8mm, ngakhale 0.6mm.Kunenepa kotereku kuyenera kuteteza bolodi kuti lisapunduke pambuyo podutsa mung'anjo ya reflow, zomwe zimakhala zovuta kwambiri.The PCB fakitale akuonetsa kuti ngati palibe chofunika kupepuka ndi woonda, bolodi akhoza makamaka ntchito makulidwe a 1.6mm, amene akhoza kwambiri kuchepetsa chiopsezo warpage ndi mapindikidwe a bolodi PCB.

4. Chepetsani kukula kwa bolodi la dera ndikuchepetsa kuchuluka kwa mapanelo
Popeza mavuni ambiri reflow ntchito unyolo kuyendetsa bolodi dera patsogolo, lalikulu bwalo dera adzakhala dented ndi opunduka mu uvuni reflow chifukwa cha kulemera kwake, choncho yesetsani kuika mbali yaitali ya bolodi dera monga m'mphepete bolodi.Pa unyolo wa ng'anjo ya reflow, kusinthika kwa concave chifukwa cha kulemera kwa bolodi lozungulira lokha kumatha kuchepetsedwa.Ichinso ndi chifukwa chochepetsera chiwerengero cha mapanelo.Ndiko kunena kuti, podutsa ng'anjo, yesetsani kugwiritsa ntchito mbali yopapatiza kuti ikhale perpendicular kwa ng'anjo yamoto, yomwe ingathe kukwaniritsa zotsika kwambiri Kuchuluka kwa concave deformation.

5. Gwiritsani ntchito thireyi ya uvuni
Ngati njira zomwe zili pamwambazi ndizovuta kuzikwaniritsa, chomaliza ndikugwiritsa ntchito tray ya ng'anjo (reflow soldering chonyamulira / template) kuti muchepetse kusinthika kwa bolodi ladera.Mfundo yakuti thireyi ya ng'anjo imatha kuchepetsa kuphulika kwa bolodi la PCB ndi chifukwa chakuti zinthu zomwe zimapangidwira ndizofala.Aluminiyamu aloyi kapena kupanga mwala adzakhala ntchito kutentha kukana, kotero PCB fakitale adzalola gulu dera kudutsa mkulu kutentha matenthedwe kukula kwa uvuni reflow ndi shrinkage ozizira pambuyo kuzirala pansi.Thireyi imatha kugwira ntchito yokhazikika pa bolodi ladera.Pambuyo kutentha kwa mbale kumakhala kotsika kuposa mtengo wa Tg ndikuyamba kuchira ndikuumitsa, kukula koyambirira kumatha kusungidwa.

Ngati single-wosanjikiza thireyi fixture sangathe kuchepetsa mapindikidwe a bolodi lozungulira , muyenera kuwonjezera wosanjikiza chivundikiro achepetsa bolodi dera ndi thireyi chapamwamba ndi m'munsi, amene kwambiri kuchepetsa mapindikidwe bolodi dera kudzera mu uvuni reflow..Komabe, thireyi ya uvuniyi ndiyokwera mtengo kwambiri, ndipo muyenera kuwonjezera ntchito kuti muyike ndikukonzanso thireyiyo.

6. Gwiritsani ntchito rauta m'malo mwa bolodi yaying'ono ya V-Cut
Popeza V-Cut idzawononga mphamvu zamapangidwe a gulu pakati pa matabwa, yesetsani kuti musagwiritse ntchito V-Cut sub-board, kapena kuchepetsa kuya kwa V-Cut.

Funso lina lirilonse, chonde Mtengo wa RFQ .