G
Garrett A. Garrettson
Researcher at Hewlett-Packard
Publications - 3
Citations - 56
Garrett A. Garrettson is an academic researcher from Hewlett-Packard. The author has contributed to research in topics: Wafer. The author has an hindex of 3, co-authored 3 publications receiving 56 citations.
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Patent
Capacitive mask aligner
TL;DR: In this paper, an aligner for aligning a mask and a wafer during photolithography of a semiconductor chip uses detection of the differential capacitance between two sets of conductive fingers on the mask and ridges on the wafer.
Patent
Electron beam driven ink jet printer
James H. Boyden,Garrett A. Garrettson,Lawrence R. Hanlon,Donald R. Bradbury,Timothy R. Groves,Armand P. Neukermans +5 more
TL;DR: In this article, a thermal ink jet print head is provided which is driven by an electron beam, which is constructed of an electron permeable thin film (electron window) which in one embodiment, has on one of its surfaces a plurality of electron absorbing (heater) pads that are in thermal contact with an ink reservoir.
Patent
Method and apparatus for lithographic rotate and repeat processing
Graham J. Siddall,Steven Glen Eaton,James B. Kruger,Garrett A. Garrettson,Armand P. Neukermans +4 more
Abstract: An X-ray lithography apparatus permits the successive exposure of each of four quadrants of a semiconductor wafer through a single mask. The mask overlays one quadrant of the wafer at a time and the wafer is rotated through 90 degrees after exposure of a quadrant to allow exposure of succeeding wafer quadrants; each wafer quadrant is independently aligned to the mask prior to exposure. In an alternative preferred embodiment, a rotatable diaphragm is used to select a single mask quadrant from a mask which overlays the entire surface of the semiconductor wafer. Both the wafer and the diaphragm may be rotated to allow various exposure combinations of mask and wafer quadrants.