Apparatus for and method of positioning and synchronizing a writ

Details Apparatus for and method of positioning and synchronizing a writ Apparatus for and method of positioning and synchronizing a writ

1987-09-22

1989-02-28

Albritton, C. L.

Recorders

Thermal recording

2191218, 21912183, 346108, G01D 1510

Patent

active

048090140

ABSTRACT:
There is disclosed a semiconductor chip and a method of directing a first writing laser beam and a second scanning laser beam across the surface of the semiconductor chip. The semiconductor chip includes first and second edges and a recognition pattern to be scanned by the scanning laser beam to facilitate the control of the relative movement of the semiconductor chip and the writing laser beam. The recognition pattern includes a pair of first enter codes disposed respectively along the first and second edges. Each of the first enter codes includes a synchronization mark and a step recognition mark disposed behind the synchronization mark considering that the scanning laser beam is directed from its edge to first scan the synchronization mark and then the step recognition mark.

REFERENCES:
patent: 4727381 (1988-02-01), Bille et al.

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