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贴片电容断裂原因分析

  • 编辑: 深圳容乐电子官网
  • 发表时间:2020-09-09
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贴片电容断裂原理分析


SMT JISHUSHIYONGDETIEPIANDIANRONGRUOCHANSHENGLIEWEN,HUIYINGXIANGCHANPINDEKEKAOXINGYIJIZUIZHONGCHANCHUCHENGPINDEBULIANGLV,ZHUYAOBULIANGBIAOXIANWEIJIECHUBULIANG、RONGZHIBIANHUA、LOUDIANDENG。YONGHUTONGCHANGJIANGZHEIXIEGUIJIEWEIYUANJIANBENSHENZHILIANGDEWENTI,ERSHISHISHANG,LIEWENDECHANSHENGCHUSHAOBUFENWEICHANPINBENSHENQUEXIAN,HAIYOUQITAXUDUOYINSUYINGXIANG。


广西快3 CHUKAICHANPINBENSHENDEWENTI,ZHUYAOCUNZAIYIXIALIANGGEDAFANGMIANDAOZHICHANPINKAILIE:RECHONGJI(Thermal Shock)HEJIXIEYINGLICHONGJI(Mechanical Shock)


热冲击:

RECHONGJIKAILIEYUEZHANKAILIEXIANXIANGZHONGBILIYUE 25%~35%。ZAOCHENGRECHONGJIKAILIEDEZHUYAOJILIWEI:RECHONGJIKAILIESHIYIZHONGJIXIEXINGSUNHUAI,TASHIYOUYUJIXIEJIEGOUBUNENGZAIDUANSHIJIANNEI,XIAOCHUHUOSHIFANGYINWENDUJIJUBIANHUAERZAOCHENGDEJIXIEYINGLI,DANGJUBUYINGLICHAOGUOJIXIETIDEQIANGDUSHI,LIEWENBIANCHUXIANLE。ZHEIZHONGJIXIEYINGLIYUREPENGZHANGXISHU(coefficient of thermal expansion,CTE)HERECHUANDAOLV(thermal conductivity, δT)YIJIWENDUBIANHUALV(ΔT)YOUGUAN。TIEPIANDIANRONGDEJIEGOUCAIYONGTAOCIJIEZHIHEJINSHUDIANJIDUOCENGJIAOCUODEZHUTIJIEGOU、YIJIDAIYOUZUODAODIANYONGTUDEJINSHUDUANDIANJI,YOUYUJINSHUYUTAOCITIDEREPENGZHANGXISHU(coefficient of thermal expansion,CTE)HERECHUANDAOLV(thermal conductivity, δT)XIANGCHAJIAODA(JIANBIAO1),ZAOCHENGTIEPIANDIANRONGYISHOUDAORECHONGJIDEYINGXIANG,RUTU1 HETU2 SUOSHI。



XIABIAOWEIFENGHUADIANRONGZHONGJINSHUYUTAOCITIDEREPENGZHANGXISHU(coefficient of thermal expansion,CTE)HERECHUANDAOLV(thermal conductivity, δT):

BIAO1



YOUYISHANGSHUJUKEYIKANCHU,ZAIWENDUJIJUBIANHUASHI,TAOCITIYUJINSHUDIANJIDEPENGZHANGHUOSHOUSUOCHAJUJIAODA,ZHIJIEDAOZHICHANPINNEIBUYINGLIJIJUZENGDA,DANGCHAOCHUCHANPINJIXIEQIANGDUSHIDAOZHICHANPINKAILIE,WAIZAIBIAOXIANTONGCHANGWEIU XINGHUOZHIJIAXINGLIEWEN。RECHONGJILIEWENTONGCHANGCONGJIEGOUZUIRUOHUOZHESHIJIXIEYINGLIZUIJIZHONGDEWEIZHIKAISHI,YIBANSHITAOCITIYUWAIJINSHU

DIANJIDEJIEHECHU。JIXIEYINGLIZUIDADEWEIZHIYIBANWEITIEPIANDIANRONGDELENGJIAOBUWEI。


TU 3:RECHONGJILIEWENWAIGUAN



广西快3 JIYUYISHANGYUANYIN,TIEPIANDIANRONG DEHANJIEGONGYIJIQIZHONGYAO。HANJIEGONGYIDEXUANZEBIXUMANZUJINKENENGJIANGDIJINSHUYUTAOCITIDEJIXIENEIYINGLI。HANJIEGONGYIDEZHUYAOYINSUWEI:YUREWENDUSHIJIAN、WENDUBIANHUALV、HANJIEZUIGAOWENYIJISHIJIAN。ZHENDUIZHEI3 GEYINSU,WOMENTUIJIANSHIYONGHUILIUHANJIEFANGSHI,BUTUIJIANSHIYONGBOFENGHANJIEHESHOUGONGHANJIEFANGSHI。

广西快3 SHOUGONGHANJIEQUEDIAN:3 GEYINGXIANGYINSUJUNBUKEKONG;


BOFENGHANJIEQUEDIAN:YOUYUCAIYONGYETAIJINSHUHANJIE,TAJUYOUZUIGAODERECHUANDAOLVHEWENDUBIANHUALV;

广西快3  HUILIUHANJIEKEYITONGGUOKONGZHIWENDUQUXIANLAIKONGZHIYISHANG 3 GEYINSU,SHICHANPINZUIDAKENENGDEBIMIANRECHONGJIKAILIE。WOMENTUIJIANDEHONGWAIHANJIEQUXIANRUXIA:


TU4:SnPb HANLIAOTUIJIANHANJIEQUXIAN



LINGWAI,HENDUOYONGHUDOUHULVEDEYIDIANJIUSHIQINGXI。QINGXIBIXULENGQUEDAO60℃YIXIACAINENGJINXING,FOUZEYEKENENGZAOCHENGCHANPINZAIQINGXIGUOCHENGZHONGYOUYULENGQUEGUOKUAIZAOCHENGCHANPINNEIBULIEWEN。

ZHEIZHONGRECHONGJIKAILIELIEWENZAIYINGLIJIZHONGWEIZHIHUOZHEBENTIQIANGDUJIAORUOWEIZHICHUXIANHOU,LIEWENHUISUIWENDUBIANHUAHUOZHEHOUDAOGONGXUDEZAIJIAGONGERJIXUMANYANKUOZHANG。ZAISHUXINGQINEIYIGEWEIXIAODELIEWENKENENGKUOZHANGZHIZHENGGEQIJIAN,ERDAOZHIKAILU、JIANXIEXINGZHONGDUANHUOZHELOUDIANDENGQINGKUANG。



JIXIECHONGJILIEWEN:

ZAIXIANJINDESHENGCHANZHIZAOHUANJINGZHONG,SMT JIQISHIZAOCHENGLIEWENDEDEZUIDAYUANYIN,TAZHANLIEWENBULIANGBILIDE80%YISHANG。CHUXIANGDANGYANZHONGDESHOUSUNWAI,YOUSMT JIQIZAOCHENGDEPOHUAIYIBANYAODAOYUANJIANHANJIEHOUCAINENGBEIFAXIAN,SUOYIZHEIXIEQUEXIANCHANGBEIRENWEISHIRECHONGJIZAOCHENGDE,SHIYUANJIANCHANGSHANGZAIZHAOXUNDUICESHIWURUQITU,ERSHIJIZAOCHENGZHEIXIESUNHUAIDEZHENXIONGSHISMT JIQIDEZHENKONGSHIQUTOU。

YOUZHENKONGSHIQUTOUDAOZHIDEPOHUAIHUOLIEWEN,SHIBIJIAOXIANERYIJIANDE(JIANTU8),TAYIBANZAITAOCITIBIAOMIANXINGCHENGYIGEYUANXINGHUOBANYUEXINGYAHEN。


广西快3 TU8 YOUZHENKONGSHIQUTOUZAOCHENGDELIEWEN




广西快3 ZHEIZHONGSUNHUAISHIYOUYUSHIQUTOU Z ZHOUYALIGUODA,CHAOGUOTAOCITIDEJIXIEQIANGDUZAOCHENGDE。

LINGWAI,DANGJINXINGDIANLUBANQIEGE、CESHI、BEIMIANYUANJIANHELIANJIEQIANZHUANGYIJIZUIHOUZUZHUANGSHI,DANGJINXINGDIANLUBANQIEGE﹑CESHI﹑BEIMIANYUANJIANHELIANJIEQIANZHUANG﹑JIZUIHOUZUZHUANGSHI,RUOHANXIZUJIANZAISHOUDAONIUQUHUOLAYAGUOCHENG,DOUKENENGZAOCHENGBending LIEWEN。TAYURECHONGJIYIYANG,YOUDUTEDEZHENGZHUANG。

广西快3 TAYIBANCHUXIANZAIHANJIEHOU,YOUYUTIEPIANDIANRONGDEZHUTIJIEGOUWEITAOCI,TASHIYIZHONGCUIXINGCAILIAO,DANGPCB BANWANQUZAOCHENGTAOCITISUOSHOUDELALIHUOYALICHAOGUOTAOCICAILIAODEQIANGDUHOU,ZAISHOULIZUIDADEBUWEIJIUCHUXIANJINSI45℃JIAOLIEWEN。



ZHEIZHONGLIEWENBUDANCHUXIANKUAI,YOUSHIHAIKENENGTINGDAOPOLIESHENG,ZHEIZHONGLIEWENHUIANPCB BANNIUQUDEFANGXIANG、CHENGDUYIJIYUANJIANWEIZHIDENGQINGKUANGMANYANKAILAI,YIJIANDISUOSHOUWAILI。

广西快3 LINGWAI,HANJIESHILIANGDUANHANLIAODEDUOSHAOYEYOUKENENGZAOCHENGKAILIE。HANLIAOJIAODUO,ZAOCHENGHANLIAOLENGQUESHOUSUOYINGLIJIAODA,TONGYANGDANGCHAOGUOTAOCITIDEQIANGDUSHIBIANCHANSHENGLIEWEN,JIANTU10。



ZHIYUYUANJIANBENSHENDEQUEXIANZHUYAOYOU 2 LEI:

1 WEITAOCICAILIAODEGAOKONGXIXINGCHENGLOUDIANLUJINGDAOZHISHIXIAO。ZAICHENGSHUCHANPINDESHENGCHANZHONGZHEILEIBULIANGJIHUBUHUIFASHENG;

广西快3 2 WEISHAOJIEKAILIE,ZHEIZHONGKAILIEDETEDIANWEILIEWENYUNEIDIANJIPINGXING。RUODPA FAXIANRUXIATUSUOSHILIEWENJIWEISHAOJIEKAILIEDAOZHI。





JIELUN:

SMT JISHUDEMEIYIGEGUOCHENGDOUYOUKENENGDUITIEPIANDIANRONGZAOCHENGSUNHAI,WEILEHUODEJIAOGAODELIANGPINLV,JIUBIXUSHIBIEZHEIXIEQIANFUDEQUEXIANLAIYUAN,BINGJIAYIKONGZHI。GUANJIANSHIYAOGUANZHUYUANJIANDECAILIAOTEXING,LIANGCAISHIYONG,ZHEIYANGCAINENGZUIDAKENENGDEBIMIANBULIANGDEFASHENG。


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