Back to 1998's patent survey.
United States Patent 5,821,494
Albrecht, et. al. Oct. 13, 1998

Method of electrical connection between head transducer and suspension by solder wire bumping at slider level and laser reflow

Abstract

A method of making a solder connection between a slider pad and a suspension pad is provided by forming a solder bump on the solder pad at the slider level, affixing the slider to the suspension so that solder can be reflowed between the slider pad and the suspension pad and then employing a laser beam to reflow at least the solder bump to form a solder connection between the slider pad and the suspension pad. Various embodiments of the method are employed for forming the solder connection. Geometric features are also optionally incorporated in the suspension pad region of the integrated suspension that can be employed to bias the suspension pads against the solder bumps in the pre-reflow state.


Inventors: Albrecht; David W. (San Jose, CA); Aoyagi; Akihiko (Fujisawa, JP); Pattanaik; Surya (San Jose, CA); Uematsu; Yoshio (Fujisawa, JP).
Assignee: International Business Machines Corporation (Armonk, NY).
Appl. No.: 722,536
Filed: Sept. 27, 1996
Intl. Cl. : B23K 26/00
Current U.S. Cl.: 219/121.64; 228/111.5; 228/180.22; 29/603.06
Field of Search: 29/603.04, 603.06; 228/180.22, 111.5; 360/104; 219/121.64, 121.66, 121.85

References Cited | [Referenced By]

U.S. Patent Documents
3,463,898Aug., 1969Takaoka et al.
4,761,699Aug., 1988Ainslie et al. 360/103
4,789,914Dec., 1988Ainslie et al. 360/104 X
4,893,742Jan., 1990Bullock 228/110
4,970,365Nov., 1990Chalco 219/121.63
4,996,623Feb., 1991Erpelding et al. 360/104
5,001,583Mar., 1991Matsuzaki 360/104
5,124,277Jun., 1992Tsumura
5,172,851Dec., 1992Matsushita et al. 228/179
5,177,860Jan., 1993Yura et al. 29/603.07
5,187,623Feb., 1993Ibaraki 360/103
5,193,738Mar., 1993Hayes 228/180.2
5,298,715Mar., 1994Chalco et al. 219/121.64
5,299,729Apr., 1994Matsushita et al. 228/180.22
5,327,310Jul., 1994Bischoff et al. 360/103
5,366,692Nov., 1994Ogashiwa 420/562
5,384,090Jan., 1995Ogashiwa 420/555
5,530,604Jun., 1996Pattanaik 360/104
5,680,275Oct., 1997Frater et al. 360/104
5,699,212Dec., 1997Erpelding et al. 360/104

Foreign Patent Documents
0 671 727 A1Sept., 1995EP
0 683 491 A2Nov., 1995EP
62-173074Jul., 1987JP
WO 95/00279Jan., 1995WO
Primary Examiner: Mills; Gregory L.
Attorney, Agent or Firm: Gray Cary Ware Freidenrich
56 Claims, 38 Drawing Figures

Back to 1998's patent survey. >