Method for preparing Kovar alloy electronic package box

An electronic packaging and box body technology, applied in the field of powder metallurgy, can solve problems such as difficulty in ensuring the inner flatness and surface quality of the box body, differences in thermal expansion performance of the package box body, and poor plastic deformation ability of the alloy, so as to reduce the risk of deformation, The product performance is uniform and the shrinkage rate is reduced

Inactive Publication Date: 2004-04-28
苏州创基精密制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application of Kovar alloy has a long history, but the Kovar alloy packaging box produced by the machining and stamping process currently used still has the following problems: (1) the manufacturing cost of the machining method is high, and the waste of raw materials is large; (2) due to cold working The amount of deformation is large, the thermal expansion performance of the packaging box in all directions is quite different, and the product performance consistency is poor, which often causes cracks and leakage damage at the sealing part of the device during use; (3) due to the plastic deformation of the Kovar alloy The ability is poor, and the stamping m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] By weight percent iron: nickel: cobalt is the ratio of 55:29:16 to prepare powder, then ball milled in high-energy ball mill for 2 hours, binding agent is made of 60% paraffin, 35% high-density polyethylene and 5% stearic acid Composition, the powder loading is 56%, the powder and binder are mixed on the SK-160 open rubber mixer, and then granulated on the PSJ32 mixing extruder to make the feeding more uniform, and the feeding is in the CJ80 -Injection molding on an E-type injection machine, the injection temperature is 160°C, and the injection pressure is 90MPa. The resulting injection-molded blank is extracted and degreased in trichlorethylene for 2 hours, then dried at 60°C for 30 minutes, and then placed in an atmosphere degreasing furnace Carry out thermal degreasing, the degreasing time is 8 hours, the degreasing base is placed in a molybdenum wire furnace with a continuous push boat for sintering, the sintering temperature is 1280°C, and the sintering time is 1 ho...

Embodiment 2

[0017] According to weight percent iron: nickel: cobalt is the ratio of 55:29:16 to prepare powder, then ball mills in high-energy ball mill for 4 hours, binder is made up of 60% paraffin wax, 35% high-density polyethylene and 5% stearic acid , the powder loading is 58%, the powder and binder are mixed on the SK-160 open rubber mixer, and then granulated on the PSJ32 mixing extruder to make the feeding more uniform, and the feeding is in the CJ80- Injection molding on an E-type injection machine, the injection temperature is 160°C, and the injection pressure is 100Mpa. The resulting injection molding blank is extracted and degreased in trichlorethylene for 2 hours, then dried at 60°C for 30 minutes, and then placed in an atmosphere degreasing furnace. Thermal degreasing, the degreasing time is 6 hours, and the degreasing body is placed in a molybdenum wire furnace with a continuous push boat for sintering, the sintering temperature is 1280°C, and the sintering time is 1 hour, a...

Embodiment 3

[0019] By weight percent iron: nickel: cobalt is the ratio of 54:30:16 to prepare powder, then ball milled in high-energy ball mill for 6 hours, binding agent is made of 80% paraffin, 15% high-density polyethylene and 5% stearic acid Composition, the powder loading is 58%, the powder and binder are mixed on the SK-160 open rubber mixer, and then granulated on the PSJ32 mixing extruder to make the feeding more uniform, and the feeding is in the CJ80 -Injection molding on an E-type injection machine, the injection temperature is 150°C, and the injection pressure is 100Mpa. The resulting injection molding blank is extracted and degreased in trichlorethylene for 6 hours, then dried at 40°C for 60 minutes, and then placed in an atmosphere degreasing furnace Carry out thermal degreasing, the degreasing time is 6 hours, the degreasing body is placed in a molybdenum wire furnace with a continuous push boat for sintering, the sintering temperature is 1250°C, and the sintering time is 3 ...

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PUM

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Abstract

The preparation process of electronic package box of Kovar alloy includes mixing the material with Fe 53-55 wt%, Ni 29-31 wt% and Co 16-18 wt% and ball milling in high energy ball mill for 2-8 hr to obtain the alloy powder; mixing the alloy powder with adhesive homogeneously and loading powder in the amount of 55-64 %; injection molding at 150-170 deg.c and 90-110 MPa in a injecting machine; solvent deoiling the injection molded blank via soaking in vinyl trichloride for 2-6 hr, drying at 40-60 deg.c for 30-60 min; hot deoiling at room temperature to 600 deg.c for 6-8 hr; and sintering at 1250-1280 deg.c inside sintering furnace for 1-3 hr; and post-treatment. The present invention has the advantages of high material utilization and high size precision.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular provides a method for preparing a Kovar alloy electronic packaging box. Background technique [0002] The invention relates to the injection molding technology, and provides a preparation method of a Kovar alloy electronic packaging box body. [0003] Encapsulation metal box is a key part of high-power microelectronics and optical fiber communication connection devices, and the failure or unstable performance of the box is one of the most important factors affecting the quality of the whole machine. In order to ensure the working stability of the electronic components in the box, it is required that the material of the metal box must have a stable thermal expansion coefficient within a certain temperature range that is consistent with the packaging glass or ceramic material, so as to avoid excessive differences in expansion coefficients between the two. A large intern...

Claims

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Application Information

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IPC IPC(8): B22F3/10B22F3/22C22C1/04C22C38/08H01L23/06
Inventor 曲选辉秦明礼段柏华何新波周晓晖
Owner 苏州创基精密制造有限公司
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