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High-stability DFN packaging device

A technology for packaging devices and high stability, which is applied in the direction of electrical solid devices, semiconductor devices, semiconductor/solid device components, etc., and can solve problems such as uneven curing, reduced thermal performance, and poor fluidity of epoxy resin compositions, achieving Package heat dissipation effect is improved, the contact area is increased, and the heat dissipation effect is improved

Active Publication Date: 2019-06-18
西安航思半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the poor fluidity or uneven curing of the epoxy resin composition during the packaging process, it is easy to cause the internal gas to be not completely exhausted and produce air holes, which will lead to moisture absorption of the packaged device and lead to reliability failure, and the generation of internal air holes may also lead to heat conduction Performance degradation resulting in electrical failure or heat loss

Method used

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Examples

Experimental program
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Effect test

Embodiment 1~4

[0037] Embodiments 1 to 4: A high-stability DFN packaged device, including a heat dissipation pad 1, a chip 3, and a conductive pad 4 located in an epoxy insulator 6, the chip 3 is located on the heat dissipation pad 1, and is located on the heat dissipation pad 1. Several conductive pads 4 are provided around the disk 1, and the conductive pads 4 and the chip 3 are connected by a lead 5;

[0038] The central area of ​​the heat dissipation pad 1 is provided with a sunken groove 11 for embedding the chip 3, thereby forming a cofferdam portion 12 at the edge area of ​​the heat dissipation pad 1, and the bottom of the sunken groove 11 and the cofferdam portion 12 are in contact with the chip. A silver paste layer 2 is provided between the lower surface and the side wall of the 3, and a number of heat exchange blind holes 13 extending into the heat dissipation pad 1 are opened at the bottom of the sinker 11, and in the heat exchange blind holes 13 It has a silver paste filling par...

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Abstract

The invention discloses a high-stability DFN packaging device. An epoxy insulator of the high-stability DFN packaging device comprises the following raw materials in parts by weight: 80-100 parts of epoxy resin, 50-70 parts of linear phenolic resin, 12-18 parts of liquid nitrile rubber, 3-8 parts of diethyl pyrocarbonate, 65-90 parts of silica powder, 0.1-1.5 parts of octylphenylpolyethylene glycol, 2-5 parts of 3-aminopropyltriethoxysilane, 2-6 parts of cellulose acetate butyrate, 0.3-2 parts of 5-fluoro-2-methoxyaniline, 0.5-5 parts of 2,4,6-tri(dimethylamiomethyl)phenol, 1-5 parts of a release agent and 10-25 parts of a flame retardant. The high-stability DFN packaging device is excellent in heat dissipation effect and mechanical property and is stable and reliable in packaging structure, thereby having a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of leadless packaging, and in particular relates to a high-stability DFN packaging device. Background technique [0002] DFN is a leadless package with a square or rectangular shape. There is a large-area exposed pad at the center of the bottom of the package for heat conduction, and there are conductive pads around the periphery of the package around the large pad for electrical connection. Because the DFN package does not have gull-wing leads like the traditional SOIC and TSOP packages, the conductive path between the internal pins and the pad is short, the self-inductance coefficient and the internal wiring resistance of the package are very low, so it can provide excellent electrical performance. And be widely used. [0003] Due to the poor fluidity or uneven curing of the epoxy resin composition during the packaging process, it is easy to cause the internal gas to be not completely exhausted and produc...

Claims

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Application Information

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IPC IPC(8): H01L23/367H01L23/29
CPCH01L23/367H01L23/295H01L2224/83385H01L2924/181H01L2224/73265H01L2224/48247H01L2224/48091H01L2224/32245H01L2924/00012H01L2924/00014H01L2924/00
Inventor 马磊党鹏杨光彭小虎王新刚庞朋涛任斌王妙妙
Owner 西安航思半导体有限公司
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