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2003-12-26    SunnyCity    http://www.smthome.net
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µØÖ·: http://www.smthome.org/article.php?articleid=127
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1.Õ´åa²»Á¼ POOR WETTING:

ß@·NÇé›rÊDz»¿É½ÓÊܵÄȱüc,ÔÚº¸ücÉÏÖ»Óв¿·ÖÕ´åa.·ÖÎöÆäÔ­Òò¼°¸ÄÉÆ·½Ê½ÈçÏÂ:
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1-2.SILICON OIL ͨ³£ÓÃì¶Ã“Ä£¼°?™»¬Ö®ÓÃ,ͨ³£•þÔÚ»ù°å¼°Áã¼þÄ_ÉÏ°l¬F,¶ø SILICON OIL ²»Ò×ÇåÀí,Òò֮ʹÓÃËüÒª·Ç³£Ð¡ÐÄÓÈÆäÊÇ®”Ëü×ö¿¹Ñõ»¯Óͳ£•þ°lÉú†–î},ÒòËü•þÕô°lÕ´ÔÚ»ù°åÉ϶øÔì³ÉÕ´åa²»Á¼.
1-3.³£ÒòÙA´æ î›r²»Á¼»ò»ù°åÑu³ÌÉϵĆ–î}°lÉúÑõ»¯,¶øÖúº¸„©Ÿo·¨È¥³ý•r•þÔì³ÉÕ´åa²»Á¼,ß^¶þ´Îåa»ò¿É½â›Q´Ë†–î}.
1-4.Õ´Öúº¸„©·½Ê½²»Õý´_,Ôì³ÉÔ­Òòžé°lÅݚ≺²»·€¶¨»ò²»×ã,ÖÂʹÅÝÄ­¸ß¶È²»·€»ò²»¾ù„ò¶øʹ»ù°å²¿·Ö›]ÓÐÕ´µ½Öúº¸„©.
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2.¾Ö²¿Õ´åa²»Á¼ DE WETTING:

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3.À亸»òº¸üc²»ÁÁ COLD SOLDER OR DISTURRED SOLDER JOINTS:

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4.º¸ücÆÆÁÑ CRACKS IN SOLDER FILLET:

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5.º¸ücåaÁ¿Ì«´ó EXCES SOLDER:

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5-2.Ìá¸ßåa²ÛœØ¶È,¼ÓéLº¸åa•rég,ʹ¶àðNµÄåaÔÙ»ØÁ÷µ½åa²Û.
5-3.Ìá¸ßîAŸáœØ¶È,¿ÉœpÉÙ»ù°åÕ´åaËùÐèŸáÁ¿,Ôø¼ÓÖúº¸Ð§¹û.
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6.åa¼â (±ùÖù) ICICLING:

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6-2.»ù°åÉϽðµÀ(PAD)Ãæ·eß^´ó,¿ÉÓþG(·Àº¸)Æá¾€Œ¢½ðµÀ·Ö¸ô?í¸ÄÉÆ,Ô­„tÉÏÓþG(·Àº¸)Æá¾€ÔÚ´ó½ðµÀÃæ·Ö¸ô³É5mm³Ë10mm…^‰K.
6-3.åa²ÛœØ¶È²»×ãÕ´åa•régÌ«¶Ì,¿ÉÓÃÌá¸ßåa²ÛœØ¶È¼ÓéLº¸åa•rég,ʹ¶àðNµÄåaÔÙ»ØÁ÷µ½åa²Û?í¸ÄÉÆ.
6-4.³ö²¨·åºóÖ®Àä…sïLÁ÷½Ç¶È²»Œ¦,²»¿É³¯åa²Û·½Ïò´µ,•þÔì³Éåaüc¼±ËÙ,¶àÓàäIåaŸo·¨ÊÜÖØÁ¦ÅcƒÈ¾ÛÁ¦À­»Øåa²Û.
6-5.ÊÖº¸•r®aÉúåa¼â,ͨ³£žéÀÓèFœØ¶ÈÌ«µÍ,Öº¸åaœØ¶È²»×ãŸo·¨Á¢¼´ÒòƒÈ¾ÛÁ¦»Ø¿sÐγɺ¸üc,¸ÄÓÃÝ^´óÍßÌØ”µÀÓèF,¼ÓéLÀÓèFÔÚ±»º¸Îï¼þµÄîAŸá•rég.

7.·Àº¸¾GÆáÉÏÁôÓКˆåa SOLDER WEBBING:

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7-2.²»Õý´_µÄ»ù°åCURING•þÔì³É´ËÒ»¬FÏó,¿ÉÔÚ²å¼þÇ°ÏÈÐк濾120¡æ¶þС•r,±¾í—ʹʑª¼°•r»Øð?»ù°å¹©‘ªÉÌ.
7-3.åaÔü±»PUMP´òÈëåa²ÛƒÈÔÙ‡ŠÁ÷³ö?í¶øÔì³É»ù°åÃæÕ´ÉÏåaÔü,´ËÒ»†–î}Ý^žé†Î¼ƒÁ¼ºÃµÄåa t¾S×o,åa²ÛÕý´_µÄåaÃæ¸ß¶È(Ò»°ãÕý³£ î›r®”åa²Û²»‡ŠÁ÷ìoÖ¹•råaÃæëxåa²Ûß…¾‰10mm¸ß¶È)

8.°×É«šˆÁôÎï WHITE RESIDUE:

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8-1.Öúº¸„©Í¨³£ÊǴˆ–î}Ö÷ÒªÔ­Òò,ÓЕr¸ÄÓÃÁíÒ»·NÖúº¸„©¼´¿É¸ÄÉÆ,ËÉÏãî?Öúº¸„©³£ÔÚÇåÏ´•r®aÉú°×°à,´Ë•r×îºÃµÄ·½Ê½ÊÇŒ¤ÇóÖúº¸„©¹©‘ªÉ̵ąfÖú,®aÆ·ÊÇËû‚ƒ¹©‘ªËû‚ƒÝ^Œ£˜I.
8-2.»ù°åÑu×÷ß^³ÌÖКˆÁôësÙ|,ÔÚéLÆÚƒ¦´æÏÂÒà•þ®aÉú°×°ß,¿ÉÓÃÖúº¸„©»òÈÜ„©ÇåÏ´¼´¿É.
8-3.²»Õý´_µÄCURINGÒà•þÔì³É°×°à,ͨ³£ÊÇijһÅúÁ¿†Îªš®aÉú,‘ª¼°•r»Øð?»ù°å¹©‘ªÉÌ?KʹÓÃÖúº¸„©»òÈÜ„©ÇåÏ´¼´¿É.
8-4.?SƒÈʹÓÃÖ®Öúº¸„©Åc»ù°åÑõ»¯±£×oŒÓ²»ÏàÈÝ,¾ù°lÉúÔÚеĻù°å¹©‘ªÉÌ,»ò¸ü¸ÄÖúº¸„©?SÅÆ•r°lÉú,‘ªÕˆ¹©‘ªÉÌ…fÖú.
8-5.Òò»ù°åÑu³ÌÖÐËùʹÓÃÖ®ÈÜ„©Ê¹»ù°å²ÄÙ|׃»¯,ÓÈÆäÊÇÔÚåƒæ‡ß^³ÌÖеÄÈÜÒº³£•þÔì³É´Ë†–î},½¨×hƒ¦´æ•régÔ½¶ÌÔ½ºÃ.
8-6.Öúº¸„©Ê¹ÓÃß^¾ÃÀÏ»¯,±©Â¶ÔÚ¿ÕšâÖÐÎüÊÕË®šâÁÓ»¯,½¨×h¸üÐÂÖúº¸„©(ͨ³£°lÅÝʽÖúº¸„©‘ªÃ¿ßL¸üÐÂ,½þÅÝʽÖúº¸„©Ã¿ƒÉßL¸üÐÂ,‡ŠìFʽÿÔ¸üм´¿É).
8-7.ʹÓÃËÉÏãÐÍÖúº¸„©,ß^Í꺸åa tºòÍ£·Å•régÌ«¾Å²ÅÇåÏ´,Œ§ÖÂÒýÆð°×°à,±MÁ¿¿s¶Ìº¸åaÅcÇåÏ´µÄ•rég¼´¿É¸ÄÉÆ.
8-8.ÇåÏ´»ù°åµÄÈÜ„©Ë®·Öº¬Á¿ß^¸ß,½µµÍÇåÏ´ÄÜÁ¦?K®aÉú°×°à.‘ª¸üÐÂÈÜ„©.

9.ÉîÉ«šˆðNÎï¼°½þÎgºÛÛE DARK RESIDUES AND ETCH MARKS:

ͨ³£ºÚÉ«šˆðNÎï¾ù°lÉúÔÚº¸ücµÄµ×²¿»ò픶Ë,´Ë†–î}ͨ³£ÊDz»Õý´_µÄʹÓÃÖúº¸„©»òÇåÏ´Ôì³É.

9-1.ËÉÏãÐÍÖúº¸„©º¸½ÓááδÁ¢¼´ÇåÏ´,ÁôϺںÖÉ«šˆÁôÎï,±MÁ¿ÌáÇ°ÇåÏ´¼´¿É.
9-2.ËáÐÔÖúº¸„©ÁôÔÚº¸ücÉÏÔì³ÉºÚÉ«¸¯Îgî?É«,ÇÒŸo·¨ÇåÏ´,´Ë¬FÏóÔÚÊÖº¸Öг£°l¬F,¸ÄÓÃÝ^ÈõÖ®Öúº¸„©?K±M¿ìÇåÏ´.
9-3.ÓЙCî?Öúº¸„©ÔÚÝ^¸ßœØ¶ÈÏŸý½¹¶ø®aÉúºÚ°à,´_ÕJåa²ÛœØ¶È,¸ÄÓÃÝ^¿ÉÄ͸ߜصÄÖúº¸„©¼´¿É.

10.¾GÉ«šˆÁôÎï GREEN RESIDUE:

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10-2.COPPER ABIETATES ÊÇÑõ»¯ã~Åc ABIETIC ACID (ËÉÏãÖ÷Òª³É·Ö)µÄ»¯ºÏÎï,´ËÒ»ÎïÙ|ÊǾGÉ«µ«½^²»ÊǸ¯ÎgÎïÇÒ¾ßÓи߽^¾‰ÐÔ,²»Ó°Ó°í‘Æ·Ù|µ«¿Í‘ô²»•þͬÒ⑪ÇåÏ´.
10-3.PRESULFATE µÄšˆðNÎï»ò»ù°åÑu×÷ÉÏî?ËÆšˆðNÎï,ÔÚº¸åaáá•þ®aÉú¾GÉ«šˆðNÎï,‘ªÒªÇó»ù°åÑu×÷?SÔÚ»ù°åÑu×÷ÇåÏ´ááÔÙ×öÇå??¶ÈœyÔ‡,ÒÔ´_±£»ù°åÇå??¶ÈµÄÆ·Ù|.

11.°×É«¸¯ÎgÎï

µÚ°Ëí—Õ„µÄÊÇ°×É«šˆÁôÎïÊÇÖ¸»ù°åÉÏ°×É«šˆÁôÎï,¶ø±¾í—Ä¿Õ„µÄÊÇÁã¼þÄ_¼°½ðŒÙÉϵİ×É«¸¯ÎgÎï,ÓÈÆäÊǺ¬ãU³É·ÖÝ^¶àµÄ½ðŒÙÉÏÝ^Ò×Éú³É´Ëî?šˆðNÎï,Ö÷ÒªÊÇÒòžéÂÈëx×ÓÒ×ÅcãUÐγÉÂÈ»¯ãU,ÔÙÅc¶þÑõ»¯Ì¼ÐγÉ̼ËáãU(°×É«¸¯ÎgÎï).
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12.ᘿ׼°šâ¿× PINHOLDS AND BLOWHOLES:

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12-1.ÓЙCÎÛȾÎï:»ù°åÅcÁã¼þÄ_¶¼¿ÉÄÜ®aÉúšâÌå¶øÔì³Éᘿ׻òšâ¿×,ÆäÎÛȾԴ¿ÉÄÜ?í×Ô×Ô„ÓÖ²¼þ™C»òƒ¦´æ î›r²»¼ÑÔì³É,´Ë†–î}Ý^žéº††ÎÖ»ÒªÓÃÈÜ„©ÇåÏ´¼´¿É,µ«Èç°l¬FÎÛȾÎïžéSILICONOIL ÒòÆä²»ÈÝÒ×±»ÈÜ„©ÇåÏ´,¹ÊÔÚÑu³ÌÖБª¿¼‘]ÆäËû´úÓÃÆ·.
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12-3.ëŠåƒÈÜÒºÖеĹâÁÁ„©:ʹÓôóÁ¿¹âÁÁ„©ëŠåƒ•r,¹âÁÁ„©³£Åc½ðͬ•r³Á·e,Óöµ½¸ßœØ„t“]°l¶øÔì³É,ÌØ„eÊÇ僽ð•r,¸ÄÓú¬¹âÁÁ„©Ý^ÉÙµÄëŠåƒÒº,®”È»ß@Òª»Øð?µ½¹©‘ªÉÌ.

13.TRAPPED OIL:

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14.º¸üc»Ò°µ :

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ijЩŸo™CËáî?µÄÖúº¸„©•þÔì³É ZINC OXYCHLORIDE ¿ÉÓà 1% µÄû}ËáÇåÏ´ÔÙˮϴ.
14-3.ÔÚº¸åaºÏ½ðÖÐ,åaº¬Á¿µÍÕß(Èç40/60º¸åa)º¸ücÒàÝ^»Ò°µ.

15.º¸üc±íÃæ´Ö²Ú:

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15-3.Íâ?íÎïÙ|:Èçë߅,½^¾‰²ÄµÈ²ØÔÚÁã¼þÄ_,Òà•þ®aÉú´Ö²Ú±íÃæ.

16.üSÉ«º¸üc :

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17.¶Ì·BRIDGING:

ß^´óµÄº¸ücÔì³ÉƒÉº¸ücÏà½Ó.

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