Method of grinding thin-film magnetic heads using optical grindi

Details Method of grinding thin-film magnetic heads using optical grindi Method of grinding thin-film magnetic heads using optical grindi

1994-10-13

1996-12-03

Will, Thomas B.

Signals and indicators

Indicators

Element wear type

G01D 2100

Patent

active

055797172

ABSTRACT:
According to the present grinding method, a plurality of optical markers are formed by photolithography such that the markers are embedded in a chiplet having a magnetic head. Markers are preferably in the shape of a bar having predetermined height, width and length and are spaced from each other by a predetermined distance where one end of the bars are sequentially offset from each other by a predetermined amount. During coarse grinding of the magnetic head as the magnetic head surface material is ground away, the end-face of the bars, one at a time, become visible. The closer the grinding surface approaches the desired inductive throat or MR element height, more end-faces become visible. Coarse grinding continues until a predetermined number of end-faces become visible at which point the grinding process is terminated and the magnetic head is ready for the final lapping process.

REFERENCES:
patent: 3414272 (1968-12-01), Rogers, Jr.
patent: 3842792 (1974-10-01), Souther
patent: 3969749 (1976-07-01), Bean
patent: 4511942 (1985-04-01), Valstyn
patent: 4648212 (1987-03-01), Dawson et al.
patent: 4841625 (1989-06-01), Valstyn
patent: 5056353 (1991-10-01), Matono
patent: 5305559 (1994-04-01), Ogawa
patent: 5331495 (1994-07-01), Yoshida et al.

Affiliated with

Also associated with

Rating

Method of grinding thin-film magnetic heads using optical grindi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of grinding thin-film magnetic heads using optical grindi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of grinding thin-film magnetic heads using optical grindi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-778090