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Constant-current diode and manufacturing method thereof

A technology of constant current diode and manufacturing method, which is applied in semiconductor/solid-state device manufacturing, semiconductor device, electrical components and other directions, can solve the problem of difficulty in reducing numerical value, and achieve the effect of reducing junction capacitance and high application value

Active Publication Date: 2016-05-11
FOUNDER MICROELECTRONICS INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the junction capacitance of constant current diodes is related to many factors such as its shape and structure, forming materials, doping conditions, etc., and the reduction of its value is often limited by various conditions and difficult to achieve

Method used

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  • Constant-current diode and manufacturing method thereof
  • Constant-current diode and manufacturing method thereof
  • Constant-current diode and manufacturing method thereof

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Embodiment Construction

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the descri...

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Abstract

Provided in the invention is a constant-current diode and a manufacturing method thereof. The constant-current diode comprises a substrate layer, an epitaxial layer arranged on the substrate layer, a first doping region, a second doping region, and a third doping region. The first doping layer, the second doping layer, and the third doping layer are arranged in the epitaxial layer and are in contact with the surface, opposite to the substrate layer, of the epitaxial layer; the second doping region is arranged between the first doping region and the third doping region; and grooves corresponding to the first doping region and the third doping region are formed in the surface, opposite to the substrate layer, of the epitaxial layer. The doping types of the first doping region and the third doping region are P types and the doping type of the second doping region is an N type; or the doping types of the first doping region and the third doping region are N types and the doping type of the second doping region is a P type. According to the invention, the junction capacitance at the exhaustion region of the constant-current diode can be reduced; and other performances of the device are not affected greatly.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a constant current diode and a manufacturing method thereof. Background technique [0002] A constant current diode (Current Regulative Diode, referred to as CRD) is a two-terminal junction field effect constant current device. It is a two-terminal semiconductor device that can provide constant current for LED or other devices when the power supply voltage changes. It is equivalent to a large current constant current source or a maximum peak current limiting circuit, even if the power supply voltage supply is unstable or the load In the case of large resistance changes, a constant supply current can be ensured. Suitable for LED lighting, LCD backlight, automotive electronics, communication circuits, handheld devices, instrumentation and micro-machines and other occasions. [0003] The junction capacitance of the constant-current diode is approximately 10pF under zero bia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L29/861H01L29/06H01L21/329
Inventor 赵圣哲
Owner FOUNDER MICROELECTRONICS INT
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