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Method and device for pasting seed crystals

A seed crystal and carbon binder technology, applied in post-processing devices, chemical instruments and methods, single crystal growth, etc., can solve the problems of seed crystal falling off, blocking gas discharge channels, long gas discharge paths, etc., reducing processing time. The effect of production cost, preventing crystal cracking and improving yield

Inactive Publication Date: 2017-03-01
SICC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the curing time of the glue is not uniform, the gas discharge path at the edge is relatively short, and it is relatively easy to discharge, but the gas discharge path at the center is relatively long, and it is more difficult to discharge
If the glue on the edge of the seed crystal solidifies first, it will block the gas discharge channel in the center, causing the edge to be firmly bonded, but there are bubbles in the middle
During the growth process of the seed crystal with bubbles, because the air exists between the seed crystal and the graphite shaft, thermal expansion will occur, causing the seed crystal to fall off or the crystal to crack due to excessive stress.

Method used

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  • Method and device for pasting seed crystals
  • Method and device for pasting seed crystals

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A seed crystal sticking method, the method is realized by the following seed crystal sticking device: the seed crystal sticking device includes a graphite shaft, and a groove is provided on the seed crystal sticking surface at the lower part of the graphite shaft;

[0018] The main steps of sticking seeds are:

[0019] (1) Evenly smear carbon adhesive or carbon-containing organic matter on the seed crystal sticking surface;

[0020] (2) Press the seed crystal on the surface of the seed crystal to make it completely fit;

[0021] (3) Activate the sintering program to sinter and solidify the carbon binder or carbon-containing organic matter.

[0022] In the described seed crystal sticking device, grooves are provided on the seed crystal sticking surface at the lower part of the graphite shaft.

[0023] The depth of the groove is 1 mm, and the width is 0.1 mm.

[0024] The grooves are arranged in the shape of rice.

Embodiment 2

[0026] A seed crystal sticking method, the method is realized by the following seed crystal sticking device: the seed crystal sticking device includes a graphite shaft, and a groove is provided on the seed crystal sticking surface at the lower part of the graphite shaft;

[0027] The main steps of sticking seeds are:

[0028] (1) Evenly smear carbon adhesive or carbon-containing organic matter on the seed crystal sticking surface;

[0029] (2) Press the seed crystal on the surface of the seed crystal to make it completely fit;

[0030] (3) Activate the sintering program to sinter and solidify the carbon binder or carbon-containing organic matter.

[0031] In the described seed crystal sticking device, grooves are provided on the seed crystal sticking surface at the lower part of the graphite shaft.

[0032] The depth of the groove is 5mm, and the width is 2mm.

[0033] The grooves are arranged in parallel.

Embodiment 3

[0035] A seed crystal sticking method, the method is realized by the following seed crystal sticking device: the seed crystal sticking device includes a graphite shaft, and a groove is provided on the seed crystal sticking surface at the lower part of the graphite shaft;

[0036] The main steps of sticking seeds are:

[0037] (1) Evenly smear carbon adhesive or carbon-containing organic matter on the seed crystal sticking surface;

[0038] (2) Press the seed crystal on the surface of the seed crystal to make it completely fit;

[0039] (3) Activate the sintering program to sinter and solidify the carbon binder or carbon-containing organic matter.

[0040] In the described seed crystal sticking device, grooves are provided on the seed crystal sticking surface at the lower part of the graphite shaft.

[0041] The depth of the groove is 3mm and the width is 1mm.

[0042] The grooves are arranged in the shape of rice.

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Abstract

The invention relates to a method and device for pasting seed crystals. A seed crystal pasting surface of the lower part of a graphite shaft is provided with a groove so that bubble discharge of the graphite shaft in sintering curing after seed crystal pasting is promoted, the binder or the carbonaceous organic matter is uniformly cured, crystal cracking caused seed crystal falling-off or excessive stress is prevented, a seed crystal pasting qualified rate is effectively improved, seed crystal growth is promoted, production is guaranteed and processing and production costs are reduced.

Description

technical field [0001] The invention relates to a method and a device for sticking seed crystals. Background technique [0002] Silicon carbide single crystal has wide bandgap, high thermal conductivity, high breakdown field strength, high saturation electron drift rate, etc. Compared with silicon single crystal, the excellent performance of silicon carbide can better meet the requirements of modern electronic technology for high temperature, high pressure, high High frequency, high power and new requirements for radiation resistance. [0003] The method of producing silicon carbide in the prior art is the technology of growing silicon carbide by the liquid phase method. Silicon is melted in a high-purity graphite crucible by heating to form a solution of carbon in silicon, and then the head is pasted with graphite with seed crystals. The shaft is extended into the solution for growth. The connection between the seed crystal and the graphite shaft is generally achieved by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/36C30B35/00
CPCC30B29/36C30B35/00
Inventor 朱灿王晓
Owner SICC CO LTD