SMT工作对贴片胶水的要求:
1.JIAOSHUIYINGJUYOULIANGJIDECHUBIANTEXING;
2.BULASI;
3.SHIQIANGDUGAO;
4.WUQIPAO;
5.JIAOSHUIDEGUHUAWENDUDI,GUHUASHIJIANDUAN;
6.JUYOUZUGOUDEGUHUAQIANGDU;
7.XISHIXINGDI;
8.JUYOULIANGHAODEFANXIUTEXING;
9.WUDUXING;
10.YANSEYISHIBIE,BIANYUJIANCHAJIAODIANDEZHILIANG;
11.BAOZHUANG。 FENGZHUANGXINGSHIYINGFANGBIANYUSHEBEIDESHIYONG。
2 在点胶过程中工艺控制起着相当重要的作用。
SHENGCHANZHONGYICHUXIANYIXIAGONGYIQUEXIAN:JIAODIANDAXIAOBUHEGE、LASI、JIAOSHUIJINRANHANPAN、GUHUAQIANGDUBUHAOYIDIAOPIANDENG。JIEJUEZHEIXIEWENTIYINGZHENGTIYANJIUGEXIANGJISHUGONGYICANSHU,CONGERZHAODAOJIEJUEWENTIDEBANFA。
2.1 点胶量的大小
GENJUGONGZUOJINGYAN,JIAODIANZHIJINGDEDAXIAOYINGWEIHANPANJIANJUDEYIBAN,TIEPIANHOUJIAODIANZHIJINGYINGWEIJIAODIANZHIJINGDE1.5BEI。ZHEIYANGJIUNENGGOUBAOZHENGYOUCHONGZUDEJIAOSHUILAIZHANJIEYUANJIANYOUBIMIANGUODUOJIAOSHUIJINRANHANPAN。DIANJIAOLIANGDUOSHAOYOULUOXUANBENGDEXUANZHUANSHIJIANZHANGDUANLAIJUEDING,SHIJIZHONGYINGGENJUSHENGCHANQINGKUANG(SHIWEN、JIAOSHUIDEZHANXINGDENG)XUANZEBENGDEXUANZHUANSHIJIAN。
2.2 点胶压力(背压)
MUQIANSUOYONGDIANJIAOJICAIYONGLUOXUANBENGGONGJIDIANJIAOZHENTOUJIAOGUANCAIQUYIGEYALILAIBAOZHENGZUGOUJIAOSHUIGONGJILUOXUANBENG(YIMEIGUOCAMALOT5000WEILI)。BEIYAYALITAIDAYIZAOCHENGJIAOYICHU、JIAOLIANGGUODUO;YALITAIXIAOZEHUICHUXIANDIANJIAODUANXUXIANXIANG,LOUDIAN,CONGERZAOCHENGQUEXIAN。YINGGENJUTONGPINZHIDEJIAOSHUI、GONGZUOHUANJINGWENDULAIXUANZEYALI。HUANJINGWENDUGAOZEHUISHIJIAOSHUIZHANDUBIANXIAO、LIUDONGXINGBIANHAO,ZHEISHIXUDIAODIBEIYAJIUKEBAOZHENGJIAOSHUIDEGONGJI,FANZHIYIRAN。
2.3 针头大小
ZAIGONGZUOSHIJIZHONG,ZHENTOUNEIJINGDAXIAOYINGWEIDIANJIAOJIAODIANZHIJINGDE1/2,DIANJIAOGUOCHENGZHONG,YINGGENJUPCBSHANGHANPANDAXIAOLAIXUANQUDIANJIAOZHENTOU:RU0805HE1206DEHANPANDAXIAOXIANGCHABUDA,NENGGOUXUANQUTONGYIZHONGZHENTOU,DANSHIDUIYUXIANGCHAXUANSHUDEHANPANJIUYAOXUANQUBUTONGZHENTOU,ZHEIYANGJINENGGOUBAOZHENGJIAODIANZHILIANG,YOUNENGGOUTIGAOSHENGCHANXIAOLV。
2.4 针头与PCB板间的距离
BUTONGDEDIANJIAOJICAIYONGBUTONGDEZHENTOU,YOUXIEZHENTOUYOUJUEDUIDEZHIDONGDU(RUCAM/A LOT 5000)。MEICIGONGZUOJINXINGYINGZUOZHENTOUYUPCBJULIDEXIAOZHUN,JIZZHOUGAODUXIAOZHUN。
2.5 胶水温度
YIBANHUANYANGSHUZHIJIAOSHUIYINGBAOCUNZAI0--50CDEBINGXIANGZHONG,SHIYONGSHIYINGTIQIAN1/2XIAOSHINACHU,SHIJIAOSHUICHONGFENYUGONGZUOWENDUXIANGFUHE。JIAOSHUIDESHIYONGWENDUYINGWEI230C--250C;HUANJINGWENDUDUIJIAOSHUIDEZHANDUYINGXIANGHENDA,WENDUGUODIZEHUIJIAODIANBIANXIAO,CHUXIANLASIXIANXIANG。HUANJINGWENDUXIANGCHA50C,HUIZAOCHENG50%DIANJIAOLIANGDIAOZHENG。YINERDUIYUHUANJINGWENDUYINGJIAYIKONGZHI。TONGSHIHUANJINGDEWENDUYEYINGDANGJIYUBAOZHENG,SHIDUXIAOJIAODIANYIBIANGAN,YINGXIANGZHANJIELI。
2.6 胶水的粘度
JIAODEZHANDUZHIJIEYINGXIANGDIANJIAODEZHILIANG。ZHANDUDA,ZEJIAODIANHUIBIANXIAO,SHENZHILASI;ZHANDUXIAO,JIAODIANHUIBIANDA,JINERKENENGSHENRANHANPAN。DIANJIAOGUOCHENGZHONG,YINGDUIBUTONGZHANDUDEJIAOSHUI,XUANQUHELIDEBEIYAHEDIANJIAOXIAOLV。
2.7 固化温度曲线
DUIYUJIAOSHUIDEGUHUA,YIBANSHENGCHANCHANGJIAYIJICHUWENDUQUXIAN。ZAISHIJIYINGJINKENENGCAIYONGJIAOGAOWENDULAIGUHUA,SHIJIAOSHUIGUHUAHOUYOUZUGOUQIANGDU。 2.8 QIPAO JIAOSHUIJUEDUIBUNENGYOUQIPAO。YIGEXIAOXIAOQIJIUHUIZAOCHENGXUDUOHANPANMEIYOUJIAOSHUI;MEICIZHONGTUGENGHUANJIAOGUANSHIYINGPAIKONGLIANJIECHUDEKONGQI,FANGZHICHUXIANKONGDAXIANXIANG。
DUIYUYISHANGGECANSHUDEDIAOZHENG,YINGANYOUDIANJIMIANDEFANGSHI,RENHEYIGECANSHUDEDIAOZHENGDOUHUIYINGXIANGDAOQITAFANGMIAN,TONGSHIQUEXIANDECHANSHENG,KENENGSHIDUOGEFANGMIANSUOZAOCHENGDE,YINGDUIKENENGDEYINSUZHUXIANGJIANCHA,JINERPAICHU。ZONGZHI,ZAISHENGCHANZHONGYINGDANGANZHAOSHIJIQINGKUANGLAIDIAOZHENGGECANSHU,JIYAOBAOZHENGSHENGCHANZHILIANG,YOUNENGTIGAOSHENGCHANXIAOLV。
YISHANGSHIGUANYUERSHOUTIEPIANJIQIANTANERSHOUTIEPIANJIQIANTANsmtDIANJIAOGONGYILIUCHENGDEZHISHIFENXIANG,QINGHAIKUAI3YAMAHAERSHOUTIEPIANJIZHISHIJIUZAIZHONGCHUANGXINGTIEPIANJIGONGSIXINGYEXINWENLANMU。