IPC-6012, SMB-SMT Buga allon kewayawa suna da iyakar yaƙi ko karkace na 0.75%, kuma sauran allunan gabaɗaya ba su wuce 1.5% ba;da izinin warpage (biyu mai gefe / Multi-Layer) na lantarki taro shuka yawanci 0.70 ---0.75%, (1.6mm kauri) A gaskiya ma, da yawa allon kamar SMB da BGA allon bukatar warpage kasa da 0.5%;wasu masana'antu har ma da kasa da 0.3%;PC-TM-650 2.4.22B

Hanyar lissafin warpage = tsayin shafi/tsawon gefen gefen
Masana'antar kewaya allon baturi tana koya muku yadda ake hana yaƙin allon kewayawa:

1. Tsarin injiniya: tsari na prepreg interlayer ya kamata ya dace;da Multi-Layer core board da prepreg yakamata suyi amfani da samfurin mai kaya iri ɗaya;yankin C / S na waje ya kamata ya kasance kusa da iyawa, kuma ana iya amfani da grid masu zaman kansu;

2. Yin burodi kafin yanke
Gabaɗaya digiri 150 na sa'o'i 6-10, cire danshi a cikin jirgi, ƙara yin maganin resin gaba ɗaya, kuma kawar da damuwa a cikin jirgi;yin burodin allon kafin yanke, ko ana buƙatar Layer na ciki ko bangarorin biyu!

3. Kula da jagorar warp da weft na takardar da aka warke kafin tara allon multilayer:
Matsakaicin raguwar warp da weft ya bambanta.Kula da warp da jagorar saƙa kafin yanke takardar prepreg;kula da warp da jagorar saƙa lokacin yanke katako mai mahimmanci;Gabaɗaya jagorar jujjuyawar takardar magani ita ce jagorar warp;tsayin daka na laminate na jan karfe shine jagorar warp;10 yadudduka 4OZ Power lokacin farin ciki farantin karfe

4. Laminating lokacin farin ciki don kawar da damuwa, latsa sanyi bayan danna allon, datsa burrs;

5. Jirgin yin burodi kafin hakowa: 150 digiri na 4 hours;

6. Zai fi kyau kada a goge farantin bakin ciki ta hanyar injiniya, kuma ana ba da shawarar tsabtace sinadarai;Ana amfani da kayan aiki na musamman a lokacin da ake amfani da wutar lantarki don hana farantin daga lankwasa da nadawa

7. Bayan fesa gwangwani, kwantar da hankali zuwa dakin zafin jiki a kan lebur marmara ko farantin karfe ko tsabta bayan sanyaya akan gado mai iyo;