G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/13 (2006.01) G02B 6/12 (2006.01) G02B 6/30 (2006.01) G02B 6/42 (2006.01)
Patent
CA 2352252
The fabrication of an optical component comprising an optical waveguide and positioning marker on a same substrate is facilitated, and the yield of the fabrication process for such an optical component is increased. By forming the core segment of the optical waveguide and the positioning marker in a same step, the positional accuracy between the core segment and the positioning marker can be improved without requiring a high level of expertise or expensive equipment such as a photographic exposure device. In the optical component comprising an optical waveguide and positioning marker on a substrate, the positioning marker is provided with rounded corners or a curved profile whereby it is possible to avoid the stress concentration which would otherwise develop due to the difference in thermal expansion between the various layers at the time of thermal processing, and the cracks which would otherwise develop in the positioning marker and the surrounding layers.
Cette invention concerne un procédé qui facilite la fabrication d'un composant optique renfermant sur un même substrat un guide d'onde optique et un repère de positionnement, et qui augmente le rendement de fabrication d'un tel composant. La réalisation en une seule opération de l'âme du guide d'onde optique et du repère de position permet d'améliorer la précision de positionnement entre l'âme et le repère sans exiger pour autant un degré poussé de savoir faire ou un matériel coûteux tel qu'un dispositif d'exposition photographique. Dans cet élément optique composé d'un guide d'onde optique et d'un repère de positionnement sur un substrat, ledit repère présente des coins arrondis ou un profil courbe qui évite des concentrations de contraintes provoquées normalement par l'écart de dilatation thermique entre les diverses couches pendant le traitement thermique ainsi que les risques de fissuration entre ce repère et les couches alentour.
Takahashi Fumio
Yoshino Fumitaka
Lesperance & Martineau
Nhk Spring Co. Ltd.
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