Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1981-11-19
1983-08-09
Hoffman, James R.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427100, B05D 312
Patent
active
043978843
ABSTRACT:
The invention relates to piezoelectric resonators formed from a block of a crystalline material. During finishing of such resonators, some of the faces thereof, the distances between which define the frequency, are subjected to abrasive operations which alter the surface state of the network, with surface cracks, dislocations and fragmentations. The invention provides a process for implanting light ions on these faces (He, Li, Be) after finishing, by creating therein a layer of vitreous protection silica from the crystallized quartz.
REFERENCES:
patent: 2989799 (1961-06-01), Mason
patent: 3914836 (1975-10-01), Hafner et al.
Proceedings of the 27th Annual Frequency Control Symposium, Electronic Industries Association, J. Vig et al., "Surface Preparation and Characterization Techniques for Quartz Resonators", pp. 98-112.
Wescon Technical Papers, vol. 20, No. 20, 1976, M. Bloch et al. "Crystal Survey", pp. 32/3-1, 32/3-14.
Compagnie d'Electronique et de Piezo-Electricite
Hoffman James R.
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