JP4895328B2 - 表面処理はんだボール及びはんだボールの表面処理方法 - Google Patents
表面処理はんだボール及びはんだボールの表面処理方法 Download PDFInfo
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- JP4895328B2 JP4895328B2 JP2007117400A JP2007117400A JP4895328B2 JP 4895328 B2 JP4895328 B2 JP 4895328B2 JP 2007117400 A JP2007117400 A JP 2007117400A JP 2007117400 A JP2007117400 A JP 2007117400A JP 4895328 B2 JP4895328 B2 JP 4895328B2
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- solder ball
- acid
- organic acid
- carboxyl group
- solder
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- 229960001367 tartaric acid Drugs 0.000 description 1
- XREKCAGAPAEVFE-UHFFFAOYSA-J tri(hexadecanoyloxy)stannyl hexadecanoate Chemical compound [Sn+4].CCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCC([O-])=O XREKCAGAPAEVFE-UHFFFAOYSA-J 0.000 description 1
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- 238000005406 washing Methods 0.000 description 1
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- 239000008096 xylene Substances 0.000 description 1
- DTOSIQBPPRVQHS-UHFFFAOYSA-N α-Linolenic acid Chemical compound CCC=CCC=CCC=CCCCCCCCC(O)=O DTOSIQBPPRVQHS-UHFFFAOYSA-N 0.000 description 1
Description
(1)炭素数が10〜25であってカルボキシル基を有する少なくとも2種類の有機酸を表面に被覆した、はんだボールであって、前記有機酸のカルボキシル基が前記はんだボールの表面とキレート配位していることを特徴とする表面処理はんだボール。
(2)前記有機酸のカルボキシル基に起因する赤外線吸収ピークが1650cm−1〜1700cm−1であることを特徴とする(1)記載の表面処理はんだボール。
(3)前記有機酸として、それぞれの融点の差が5℃〜45℃である少なくとも2種類の有機酸を含むことを特徴とする(1)又は(2)記載の表面処理はんだボール。
(4)前記有機酸として、少なくともステアリン酸とパルミチン酸を含むことを特徴とする(1)又は(2)記載の表面処理はんだボール。
(5)前記はんだボールが、鉛フリーはんだボールであることを特徴とする(1)又は(2)記載の表面処理はんだボール。
(6)前記鉛フリーはんだボールが、スズ単体はんだボール、又は、銅、銀、ビスマス、亜鉛、アンチモン、インジウム、アルミニウム、マグネシウム、リン、ヒ素、ビスマス、若しくはゲルマニウムの中から選ばれる1種以上の金属を含むスズ合金はんだボールであることを特徴とする(5)記載の表面処理はんだボール。
(7)炭素数が10〜25であってカルボキシル基を有する少なくとも2種類の有機酸を有機溶媒に溶解する工程と、
前記溶液に、はんだボールを分散する工程と、
前記有機溶媒を、はんだボールから除去する工程と、
有機溶媒を除去した、はんだボールを60℃〜180℃で熱処理して前記有機酸のカルボキシル基を前記はんだボール表面にキレート配位させる工程と、
を含むことを特徴とするはんだボールの表面処理方法。
Claims (7)
- 炭素数が10〜25であってカルボキシル基を有する少なくとも2種類の有機酸を表面に被覆した、はんだボールであって、前記有機酸のカルボキシル基が前記はんだボールの表面とキレート配位していることを特徴とする表面処理はんだボール。
- 前記有機酸のカルボキシル基に起因する赤外線吸収ピークが1650cm−1〜1700cm−1であることを特徴とする請求項1記載の表面処理はんだボール。
- 前記有機酸として、それぞれの融点の差が5℃〜45℃である少なくとも2種類の有機酸を含むことを特徴とする請求項1又は2記載の表面処理はんだボール。
- 前記有機酸として、少なくともステアリン酸とパルミチン酸を含むことを特徴とする請求項1又は2記載の表面処理はんだボール。
- 前記はんだボールが、鉛フリーはんだボールであることを特徴とする請求項1又は2記載の表面処理はんだボール。
- 前記鉛フリーはんだボールが、スズ単体はんだボール、又は、銅、銀、ビスマス、亜鉛、アンチモン、インジウム、アルミニウム、マグネシウム、リン、ヒ素、ビスマス、若しくはゲルマニウムの中から選ばれる1種以上の金属を含むスズ合金はんだボールであることを特徴とする請求項5記載の表面処理はんだボール。
- 炭素数が10〜25であってカルボキシル基を有する少なくとも2種類の有機酸を有機溶媒に溶解する工程と、
前記溶液に、はんだボールを分散する工程と、
前記有機溶媒を、はんだボールから除去する工程と、
有機溶媒を除去した、はんだボールを60℃〜180℃で熱処理して前記有機酸のカルボキシル基を前記はんだボール表面にキレート配位させる工程と、
を含むことを特徴とするはんだボールの表面処理方法。
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