40 micron ultra-thin metal bond diamond dicing knife for Faraday rotator and its application

Abstract

The invention discloses a 40-micron ultra-thin metal bond diamond scribing knife for a Faraday rotator and its application. The preparation method of the scribing knife is to mix copper powder, tin powder, aluminum oxide and titanium hydride to obtain a metal-based matrix ; Then the metal-based matrix is ​​mixed with liquid paraffin, graphite balls, and diamonds, and then sieved to obtain the material under the sieve; the material is pressed to obtain a cold-pressed green body; the cold-pressed green body is sintered to obtain a molded body; the molded body is passed through Machining to obtain a diamond scribing knife for cutting filter glass. The dicing knife disclosed in the present invention has the characteristics of ultra-thin, high rigidity and good self-sharpening. When the thickness is only 40 μm, the cutting speed of the existing Faraday rotator can be increased from 0.2 mm / s to 0.5 mm / s. The service life is increased from 10 to 25‑30, and the chipping of the current electroforming knife is controlled at about 50 μm. The chipping of the scribing knife disclosed in the present invention can be controlled within 30 μm, and mass production can be realized without breaking the knife or beveling phenomenon appears.

Description

technical field [0001] The invention belongs to the technical field of superhard materials for dicing blade technology, and in particular relates to a 40-micron ultra-thin metal bond diamond dicing blade for a Faraday rotator and an application thereof. Background technique [0002] The main components of the Faraday rotator are yttrium iron garnet and glass, the single-stage group is GPG, and the double-stage composition is PGPGP. Yttrium iron garnet has a garnet crystal structure and is an important variety of microwave ferrite. It has the characteristics of small resonance linewidth, low saturation magnetization, low dielectric loss and high density. It has become a widely used microwave ferrite device, and is an important basic material for circulators, isolators, phase shifters, modulators, filters, switches and other devices. [0003] The Mohs hardness of yttrium iron garnet is as high as 7-8 (referring to diamond Mohs hardness is 10), the thickness is 0.8mm, and the ...

AI Technical Summary

Problems solved by technology

However, this type of blade has the weakness of low cutting ability caused by too high bond strength, resulting in slow cutting speed (≤0.2mm / s); at the same time, due to the high bond strength, the diamond holding force is too strong, causing the scribing knife itself The self-sharpening is very poor, and the scribing knife becomes blunt after cutting a very short distance, and cannot be used due to the deformation and failure of the blade.

Due to the short life, frequent tool changes, and the very low cutting speed, the overall processing efficiency is very low. Enterprises need to purchase a large number of equipment, which increases the cost of equipment.

Images