Ambit light sensor with function of IR sensing
AssigneeMaxchip Electronics Corp.
InventorsJin-Wei Chang, Jen-Yao Hsu, Hong-Xian Wang, Yu-Hsien Chen
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Abstract
An ambit light sensor with a function of IR sensing and a method of fabricating the same are provided. The ambit light sensor includes a substrate, an ambit light sensing structure, an infrared ray (IR) sensing structure, and a dielectric layer. The ambit light sensing structure is located over the substrate for sensing and filtering visible light. The IR sensing structure is located in the substrate under the ambit light sensing structure for sensing IR. The dielectric layer is located between the ambit light sensing structure and the IR sensing structure.
Claims21
An ambient light sensor with a function of infrared ray sensing, comprising:
- a substrate, wherein a material of the substrate includes a semiconductor;
- an ambient light sensing structure, located above the substrate and configured to sense and filter visible light;
- an infrared ray sensing structure, located in the substrate under the ambient light sensing structure and configured to sense infrared ray, wherein the ambient light sensing structure covers the infrared ray sensing structure entirely;
- and
- a dielectric layer, located between the ambient light sensing structure and the infrared ray sensing structure, wherein a metal interconnect is formed in the dielectric layer and the ambient light sensing structure is not electrically connected to the infrared ray sensing structure through the metal interconnect.
A method of fabricating an ambient light sensor with a function of infrared ray sensing, comprising:
- forming an infrared ray sensing structure in a substrate to sense infrared ray, wherein a material of the substrate includes a semiconductor;
- forming a dielectric layer on the substrate;
- forming a metal interconnect in the dielectric layer;
- and
- forming an ambient light sensing structure on the dielectric layer to cover the infrared ray sensing structure entirely, and the ambient light sensing structure is not electrically connected to the infrared ray sensing structure through the metal interconnect.
Dependencies are inferred from the claim text.