Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2006-04-04
2006-04-04
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603070, C029SDIG016, C427S096200, C427S099400, C216S042000, C216S048000
Reexamination Certificate
active
07020959
ABSTRACT:
Methods of making a magnetic recording device with an “anchored” conductive stud which is securely attached within its surrounding insulator materials. The conductive stud is formed over a conductive layer which is coupled to or part of a read or a write head element of the magnetic recording device. The conductive stud has a top stud portion and a bottom undercut portion formed over the conductive layer. In one illustrated embodiment, the bottom undercut portion has a width that is greater than the width of the top stud portion. Since an insulator is formed around the conductive stud and over its bottom undercut portion, a secure coupling between the conductive stud and the conductive layer is provided. Preferably, the conductive layer is made of copper (Cu), the conductive stud is made of gold (Au), and the insulator is alumina (Al2O3). A seed layer may be formed between the conductive stud and the conductive layer.
REFERENCES:
patent: 5226232 (1993-07-01), Boyd
patent: 5462637 (1995-10-01), Thiele
patent: 5863448 (1999-01-01), Otani et al.
patent: 61-68718 (1986-04-01), None
patent: 4-10534 (1992-01-01), None
Krause Rainer Klaus
Marien Jan
Paul Johannes Thomas
Sandmann Gunther Wilhelm
Scherb Gerhard Anton
Hitachi Global Storage Technologies - Netherlands B.V.
Oskorep, Esq. John J.
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