ÒøÓégegÓÅÔ½»á

http://edadoc.com/

ÖÐÎÄ

EN JP
ºá·ù¹ã¸æbanner-¸ßËÙÏÈÍâÐлú°æ
PCBÉú²úÓë¼Ó¹¤ > ÕâÖÖBGAµÄ¹ý¿×¿ª´°Éè¼ÆÄã×ö¹ýÂð

ÕâÖÖBGAµÄ¹ý¿×¿ª´°Éè¼ÆÄã×ö¹ýÂð

Ðû²¼Ê±¼ä£º2022-05-30 17:25

×÷ÕߣºÒøÓégegÓÅÔ½»á¿Æ¼¼¸ßËÙÏÈÌìÉúÔ± Íõ»Ô¶«


Ô糿À´ÉϰàµÄÁÖÈçÑÌÃÀµÃ¾ÍÏñÄÇÎåÔµĴóÌ«Ñô £¬»ÎÑÛ¡£
×øÔÚËýËÀºóµÄÕÔÀí¹¤ £¬¿´µÃÊÇÑÛ»¨çÔÂÒ £¬²»¿É¶¨ÐÄ»­°å¡£
¾Þ½³ÐÖÔçÒÑÀÏÉ®È붨 £¬×îÏÈÁËÒ»ÌìµÄÊÂÇé¡£
ͻȻһÕóÏã·çÏ®À´ £¬Ò»¸öñºñ»µÄÉíÓ°À´µ½ËûµÄ¸úǰ¡£
ÁÖÈçÑÌ˵£º¡°¾Þ½³ÐÖ £¬ÓиöÎÊÌâÌÖ½ÌÏ £¬ÎÒÕâ¸ö°å×ÓÓиöBGA £¬¿Í»§ÒªÇóÔÚBGAÏÂÃæÓùý¿×µ±²âÊԵ㠣¬Äã°ïÎÒ¿´¿´ £¬Õâ¸ö¹ý¿×µÄ¿ª´°ÒªÔõôÉè¼ÆºÏÊÊ¡£¡±



¾Þ½³ÐÖ¿´µ½ÈçÑ̵ÄÉè¼ÆµÄ²âÊԵ㠣¬BottomÃæ¿ª´°Ã»ÓÐÎÊÌâ £¬¿ÉÊÇ·­¿ªTop²ã×躸һ¿´ £¬Ò¡Ò¡Í· £¬Ò»Éù³¤Ì¾¡£


205-1.png


BGA±³ÃæµÄ¹ý¿×¿ªÁË´°×ö²âÊԵ㠣¬¿ÉÊÇTOP²ãÒ²¿ªÁË´° £¬º¸½ÓÊÇÓÐÒì³£µÄ¡£



¹ý¿×ÓÐÒ»¸öоÎüЧӦ £¬ÈôÊÇBGAÄÚ²¿µÄ¹ý¿×Ë«Ãæ¿ª´° £¬BGAÔÚº¸½ÓÀú³ÌÖÐ £¬º¸ÁÏÈÛ»¯ £¬µ¼Öº¸ÁÏͨ¹ýÓ뺸ÅÌÏàÁڵĹý¿×Á÷ʧ £¬Ôì³Éº¸ÇòÉÏÎýȱʧ £¬·ºÆðÐ麸µÄÕ÷Ïó £¬ÈôÊÇÎýÁ÷µ½BGAµÄÏÂÃæ £¬ºÍÆäËüÆ÷¼þµÄº¸µãÅþÁ¬ £¬ÄǾͷºÆðÁ˶Ì·¡£
ÒÔÊÇ˵BGAÏÂÃæµÄ²âÊÔµãÊÇÒª¿ª´°µÄ £¬BGAÃæÊÇÈû¿× £¬²»¿É¼Ó¿ª´°¡£



IPCרÃÅΪBGAµÄÉú²ú×öÁËÒ»¸ö±ê×¼ £¬¡¶IPC-7095 BGAµÄÉè¼Æ¼°×é×°¹¤ÒÕµÄʵÑé¡·ÄÚÀï¹ØÓÚ¹ý¿×¿ª´°µÄÒþ»¼ £¬ÓÐÒ»¸öÏêϸµÄ˵Ã÷ £¬Ö±½ÓÉÏͼ°É¡£


205-2.png


ÈçÉÏͼËùʾ £¬ÈôÊÇBGAÄڵĹý¿×¿ªÁË´° £¬ÖÆÆ·ºó¾ÍÊÇÏÂÃæµÄÑù×Ó £¬ÎýÓпÉÄܾͱ»Îü×ßÁË £¬Î´À´¶Ì·Ð麸һÁ¬´®µÄ²»Á¼µÈ×ÅÄã £¬ÎÒÃDz»ÊÇÀ´×ö¿ÉÖÆÔìÐÔÉè¼Æ £¬ÊÇÖÆÔìÎÊÌâ £¬Äã˵º¸½Ó³§ÒªÔõôº¸½Ó²Å»ª°ü¹ÜBGAµÄÆ·ÖÊÄØ £¬ÎÒ¸ÐÊÜÊǾÅËÀÒ»Éú¡£


205-3.png


ÕâÖÖÕ÷Ïóͨ³£±¬·¢ÔÚº¸µæÓе¼Í¨¿×(via)µÄʱ¼ä £¬ÓÉÓÚÎýÇòÁ÷¾­»ØÁ÷º¸(Reflow)ʱ²¿·ÖµÄÎý»áÓÉÓÚëϸÕ÷Ïó(wicking)Á÷½øµ¼Í¨¿×¶øÔì³ÉÎýÁ¿È±·¦¡£X-RAYµÄ¼ì²éºó £¬Á¬Îý¶Ì·ÁË¡£


205-4.png


ÒÔÊǹý¿×¿ª´°ºÜÖ÷Òª £¬Îôʱ¾ÍÓÉÓÚ¿Í»§µÄÒ»¸öÕâÑùÉè¼Æ £¬²îµã·ºÆðÁËÑÏÖØµÄЧ¹û £¬ÐÒ¿÷Ò»¸öÅ®ÈËʵʱ·ºÆðÕü¾ÈÕâ¸ö°å×Ó¡£



¡°É¶Å®ÈË £¬ÕâÓйÊÊ £¬¾Þ½³ÐÖ˵À´ÌýÌý.¡±ÕÔÀí¹¤ £¬²»ÖªµÀʲôʱ¼äÒ²À´µ½ËûÃǵÄËÀºó £¬ºÜ°ËØÔµÄÎʵÀ¡£
¡°ÊÇѽ £¬ÊÇѽ £¬¾Þ½³ÐÖ £¬½²½²Å®ÈËÔõô¾ÈÁ˿ͻ§¡£¡±ÈçÑ̵É×Åһ˫ÃÀÄ¿ £¬Ò²ËæÉùÔÞÐí×Å¡£
¾Þ½³ÐÖË«ÑÛÔ¶Íû×Å´°Íâ £¬Ë¼Ð÷·Éµ½ÁËÒ£Ô¶µÄÒÔǰ¡£
ÄÇÊǶËÎç½Ú·Å¼ÙǰµÄ¼¸Ìì £¬PCBA¹¤³§½Óµ½ÁËÒ»¸öº¸½ÓµÄ¼Ó¼±ÏîÄ¿ £¬¿Í»§ÔÚÍâµØ³ö²î £¬Á½ÌìºóÒª»ØÀ´ÄÃPCBA°åÈ¥²ÎÕ¹ £¬°å×ÓÊǿͻ§ÒÔºóÍâPCB¼Ó¹¤ºó·¢¹ýÀ´µÄ¡£



µ±ÎÒÃǵÄIQCÔÚ¼ì²é°å×ÓµÄʱ¼ä £¬·¢Ã÷BGAÓÐÁ½¸öº¸ÅÌÉϸÇÁËÓÍ £¬¼´ÊÇÁ½¸öBGAº¸ÅÌûÁË¡£


205-5.png


Éú²úÒì³£ £¬¸ÏæÁªÏµ¿Í»§ £¬¿Í»§ÂíÉÏÕÒÁËPCB¹¤³§¡£



Ô­À´Êǿͻ§Éè¼ÆÓõÄEADÈí¼þ £¬Ã»ÓÐÌØÊâÉèÖùý¿×¿ª´°ÕâÒ»Ïî £¬µ¼Ö¹¤³§ÔÚÔ­Îļþת»»gerberºó £¬Êä³öµÄÎļþÄÚÀï¹ý¿×ÊÇ¿ª´°µÄ £¬ÕâÒ»µãÔÚPCBÔ­ÎļþÄÚÀïÊǼì²é²»³öÀ´µÄ¡£



Ô­ÎļþÄÚÀïûÓйý¿×¿ª´° £¬¿ÉÊÇת³öÀ´µÄGERBERÊÇ¿ª´°µÄ¡£


205-6.png


°å×ÓͶµ½¹¤³§µÄʱ¼ä £¬CAM¹¤³ÌʦÕվɺÜÂÄÀúµÄ £¬ÂíÉÏ·¢Á˹¤³ÌÈ·ÈÏ £¬ÐÎòÈçÏ£º



°åÄÚ¹ý¿×Ë«Ãæ¿ª´° £¬ÌØÊâÊÇBGAÇøÓò £¬ÎªÁ˱ÜÃ⺸½Óʱ £¬ÓÐÁ¬Îý¶Ì·»òÕßÐ麸µÄ±¬·¢ £¬½¨Òéɾ³ýÈ«°å¹ý¿×¿ª´°×ö×躸Èû¿× £¬ÇëÈ·ÈÏÊÇ·ñOK¡£
Æäʱ¿Í»§¸ÐÊܹ¤³§½¨ÒéºÜºÏÀí £¬¾ÍÓä¿ìµÄ»Ø¸´Á˸öOK¡£
Ч¹û°å×Ó×ö³öÀ´ÒÔºó £¬ÓÐÁ½¸öBGAµÄº¸ÅÌÉϸÇÁËÓÍ £¬º¸½Ó³öÁËÒì³£¡£
ØÊºóÎÊÌâµÄÔµ¹ÊÔ­ÓÉÕÒµ½ÁË £¬ºÜ¼òÆÓ £¬ÓÉÓÚ°åÄÚBGAµÄ¿ª´°ºÍ¹ý¿×µÄ¿ª´°³ß´çÒ»Ñù´ó¡£
¹¤³§¹¤³ÌʦÔÚɾ³ý¹ý¿×¿ª´°Ê± £¬²»Ð¡ÐĶàÑ¡ÁËÁ½¸öBGAµÄ¿ª´° £¬ÒÔÊÇBGAµÄÁ½¸öº¸ÅÌÉϾ͸ÇÉÏÁË×躸ÓÍÄ«¡£

ÆäʱÎҺͿͻ§¾­³£ÏàͬÊÖÒÕÎÊÌâ £¬¹ØÏµÌØÊâÌú £¬ÒÔÊÇËû¾Í´òµç»°ÈÃÎÒ×ÊÖú½â¾öÏ¡£ÎÒ¸ÏæȥÁËPCBA¹¤³§ £¬Æäʱ¹¤³§Íõ³§Ò²ºÜ¸øÁ¦ £¬ÕÒÁËÒ»¸öƯÁÁµÄÅ®º¢×ÓÀ´×ÊÖú½â¾öÕâ¸öÎÊÌâ¡£
¡°Ôõô½â¾öµÄ¡°ÁÖÈçÑ̺ÍÕÔÀí¹¤Í¬Ê±ÎʵÀ¡£
¡°Å®ÈËÓÃËýÁéÇɵÄË«ÊÖ £¬ÄÃ׏ε¶Ò»Æ¬Ò»Æ¬µÄ°ÑÕâÁ½¸öº¸Å̸øÍêÕûµÄ¹Î³öÀ´ £¬ÕûÕû¹ÎÁËÒ»Ìì £¬ÑÛºìÁË £¬ÊÖÖ×ÁË £¬ÎÒÌØÊâÐÄÌÛÕâÅ®ÈË¡£°å×Óµ±Íí¾ÍÉÏÁËÏß £¬¿Í»§Ò²Ë³Ëì²ÎÁËÕ¹ £¬ÖÐÁË±ê £¬½Ô´ó»¶Ï²¡£¡±



¹ý¿×Éè¼ÆÁ½ÖÖ·½·¨ £¬Ò»ÖÖÊÇ¿ª´° £¬Ò»ÖÖÊÇÈû¿× £¬ÏÂÃæµÄÁ½ÖÖÉèÖÃÄãÄÜÇø·ÖÇåÎúÂð¡£


205-7.png

205-8.png


ÈËÉú¾ÍÏñÒ»±­¿§·ÈÓеã¿à,Ö»ÊÇÅ®È˵ķºÆðÓÐÁËÄÇôһµãÌ𠣬Ìî²¹Á˿ͻ§Éè¼ÆÉϵÄȱÏÝ¡£



ØÊºóÎÒ¾ÍÌØÊâллÕâÅ®ÈË £¬ÎÒ¾ÍÔ¼ËýÍíÉÏÓ÷¹ £¬Å®ÈËÐß´ð´ðµÄºÍÎÒÒ»ÆðÈ¥ÁË¡£
ÎÒ²»ÖªµÀÆäʱÎÒÐÄÖеĸÐÊÜÊÇʲôÑù £¬ÎÒÖ»ÖªµÀÅ®ÈË˵ËýÍíÉÏ9µãÀ´¸°Ñç £¬ÎÒ8µãÒѾ­×îÏÈ¿ªÐÄÁË¡£
ØÊºóµÄØÊºó £¬ÕâÅ®È˳ÉÁËÎÒµÄÐÂÄï £¬¸øÎÒÉúÁËÈý¸ö¶ù×Ó £¬»¹¿ØÖÆ×ÅÎҵľ­¼Ã´óȨ¡£ÕâЩÄêÎÒÊdzýÁ˲»»áÉúСº¢ £¬ÎÒɶ¼ÒÎñ¶¼»á¸É £¬²¢ÇÒËý»¹Ê±Ê±Ê±µÄߺºÈÎÒ £¬Ðж¯ÂéÀûµã¸Ïæ°ÑÍëÏ´ÁË £¬Ð¡ÐÄÀÏÄï¹ÎÁËÄã¡£
ÁÖÈçÑ̺ÍÕÔÀí¹¤ÌýÍê¾Þ½³Ðֵϰ £¬¶¼¿Ö»ÅµÄµÉ´óÁËÑÛ¡£

ÕâÕýÊÇ£º
¹ý¿×Éè¼ÆºÜÒªº¦ £¬
¿ª´°Èû¿×νÁÉ¢ £¬
Á¬Îý¶Ì·ÕÒÉÏÃÅ £¬
·â×°ÓôíÒªÐ麸¡£

ÍøÕ¾µØÍ¼