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Light-receiving device and light-receiving module comprising said light-receiving device

A technology of light-receiving devices and light-receiving modules, which is applied to semiconductor devices, electrical components, circuits, etc., and can solve problems such as difficulty in achieving reliability, increasing parts and assembly processes for making light-receiving modules, and increasing costs

Inactive Publication Date: 2003-09-10
SANYO ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This will increase the number of parts and assembly processes for making the light receiving module, thereby increasing the cost
Also, for the case where the interference filter is embedded in the light-shielding resin, it is difficult to achieve satisfactory reliability due to the mounting accuracy of the interference filter, resin coming off from the interference filter, and other factors.

Method used

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  • Light-receiving device and light-receiving module comprising said light-receiving device
  • Light-receiving device and light-receiving module comprising said light-receiving device
  • Light-receiving device and light-receiving module comprising said light-receiving device

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Embodiment Construction

[0020] Embodiments of the present invention will be described below with reference to the accompanying drawings. figure 1 A sectional view showing a light receiving device according to a first embodiment of the present invention, figure 2 for its floor plan. Light receiving device 1 has light receiving portion 3 formed on the upper surface of low impurity concentration substrate 2 , and short carrier lifetime layer 4 formed on the lower surface of substrate 2 .

[0021] Substrate 2 is, for example, a Si substrate of the first conductivity type (P type), with 4×10 13 cm -3 or lower device impurity concentration, thick 300μm. This substrate 2 is prepared to be highly resistive, for example, having a specific resistance of 500 Ωcm or higher, as a (P-) layer 2a. On the lower surface of the substrate 2, N-type impurities such as phosphorus (P) are diffused to form a second conductivity type (N-type) high impurity concentration layer 4 as a short carrier lifetime layer with a ...

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Abstract

A light-receiving device has a high-concentration impurity layer of a first conductivity type and a high-concentration impurity layer of a second conductivity type surrounding it formed on a substrate of the first conductivity type having a low impurity concentration so as to function as a light-receiving portion. The high-concentration impurity layers of the first and second conductivity types are arranged in the same direction as the top surface of the substrate. A layer having a short carrier life time is formed on the bottom surface of the substrate. Thus, carriers ascribable to unnecessary light components that have reached the layer having a short carrier life time have a shorter life time, making it possible to sufficiently cut unnecessary long-wavelength light components.

Description

technical field [0001] The invention relates to a light receiving device and a light receiving module containing the light receiving device. Background technique [0002] The light receiving device included in the light receiving module for remote control generally includes an infrared light receiving device. Commonly known examples of such light-receiving devices are Figure 9 shown along the substrate thickness direction or Figure 10 Shown are those light-receiving devices in which PIN type diodes formed along the surface of the substrate constitute the light-receiving portion. exist Figure 9 In, the reference numeral 101 represents the P-type layer, and the reference numeral 102 represents the P-type layer + layer, reference numeral 103 represents N + layer, reference number 104 represents SiO 2 An insulating layer, reference numeral 105 represents an N-type electrode, and reference numeral 106 represents a P-type electrode. Figure 9 The structure shown has the dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/10H01L31/02H01L31/103
CPCH01L31/02005H01L31/103
Inventor 西村晋
Owner SANYO ELECTRIC CO LTD