Visible light sensor

• Main Author: HE GUANJUN
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COLORIMETRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; RADIATION PYROMETRY; SEMICONDUCTOR DEVICES; TESTING; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention provides a visible light sensor comprising a wafer and a packaging unit coating the periphery of the wafer. A photosensitive circuit is processed on the wafer. The packaging unit is made of a light-transmittable high molecular material; and infrared ultraviolet cut-off colouring agent with the mass ratio of 1% to 5%, liquid bisphenol A type epoxy resin with the mass ratio of 45% to 49%, and liquid anhydride type curing agent with the mass ratio of 50% are stirred uniformly at a normal temperature to prepare the light-transmittable high molecular material. The photosensitive circuit includes two photodiodes, an operational amplifier and a filter. Light passes through the light-transmittable high molecular material and thus infrared light and ultraviolet light are filtered; visible light passing through the light-transmittable high molecular material irradiates the photodiodes of the wafer; the photodiodes form unidirectional voltages; and after amplification by the operational amplifier and filte