Daily Archives: July 23, 2015

Sapphire Windows introduction

This practical new involved a Sapphire window, purpose is provides a can effective solution existing application Yu optical window of Sapphire chip, and Crystal block due to by artificial growth of Sapphire Crystal specifications by limited size far cannot reached many modern optical system of Aperture requirements of Sapphire scan window, by said Sapphire window at least by two block Sapphire Crystal mosaic formed, two block Sapphire Crystal of combined surface coated cloth has paste slurry. This practical new will paste slurry coated cloth in two block Sapphire Crystal of combined surface formed joint, in connection process in the was connection Sapphire Crystal can keep not melting; and paste slurry is by powder solder composition, through hot, can makes solder and Sapphire Crystal in interface at occurred mutual diffusion and interface reaction, while solder itself also achieved dense of, to reached connection Sapphire Crystal of purpose.

Technical field

The utility model involves a Sapphire window.
Background art
Sapphire high strength, high hardness, high temperature resistance, corrosion resistance, good abrasion resistance, low coefficient of friction, high resistivity, but also has good thermal conductivity and electrical insulation, Sapphire is the most critical in the visible and Li IR bands with good light transmittance, is considered to be an infrared military equipment, satellite ideal material for optical Windows. Apply existing optical window of Sapphire wafer, Crystal blocks due to limited growth of artificial sapphire crystals size dimensions far from enough to meet a lot of modern optical system aperture requirements; you’ll need to paste different Sapphire, to meet the size requirements.
Utility
In order to solve the technical problems mentioned above, the purpose of this utility is to provide a way to effectively apply existing optical window of Sapphire wafer, Crystal blocks due to limited growth of artificial sapphire crystals size size cannot meet the requirements of many modern optical system aperture Sapphire scan window.
Sapphire Windows of the utility, its innovations: the Sapphire-Sapphire Crystal mosaic window of at least two blocks form.
Further, in the combination of two Sapphire Crystal surface coated with paste slurry.
And existing technology compared, this practical new of Sapphire window at least has following advantages: this practical new will paste slurry coated cloth in two block Sapphire Crystal of combined surface formed joint, in connection process in the was connection Sapphire Crystal can keep not melting (reference glass soldering welding method); and paste slurry is by powder solder composition, through hot, can makes solder and Sapphire Crystal in interface at occurred mutual diffusion and interface reaction, while solder itself also achieved dense of, to reached connection Sapphire Crystal of purpose ( Refer to the reaction sintering method). This practical new can effective solution existing application Yu optical window of Sapphire chip, and Crystal block due to by artificial growth of Sapphire Crystal specifications by limited size far cannot reached many modern optical system of Aperture requirements, to reached its requirements; addition, due to this invention selection has industrial practice in the has is mature and relative cost low of technology phase tie, from smaller of melt body growth of blank production out big area of Sapphire window, can greatly reduced connection cost.
Firstly, the surface is polished, and then polished to a certain surface finish;
Cleaning with acetone and ultrasonic vibrations.
Using organic solvents such as ethanol, A1203 Si02 and redeployment of MgO powder mixture into paste paste, then evenly on the cleaned surface a layer of paste sizing agent.
Sapphire Crystal I paste paste 2 made in graphite Jig assembling good connections, and place a weight on the connectors, Sapphire Crystal and Sapphire Crystal to ensure the welding process tightly compacted.
Sapphire connectors assembled in a vacuum furnace pressure of residual stress due to the large sapphire connects easily and sapphire material is very sensitive to stress, thus pressurizing smaller cooling rate in the process in order to reduce the residual stresses in the joints.
At room temperature, measured by four-point bending flexural strength of joints, and compare with the Sapphire intensity without connecting qualified finished products warehouse to save.
This practical new will paste slurry coated cloth in two block Sapphire Crystal of combined surface formed joint, in connection process in the was connection Sapphire Crystal can keep not melting (reference glass soldering welding method); and paste slurry is by powder solder composition, through hot, can makes solder and Sapphire Crystal in interface at occurred mutual diffusion and interface reaction, while solder itself also achieved dense of, to reached connection Sapphire Crystal of purpose (reference reaction sintering method). This invention can effective solution existing application Yu optical window of Sapphire chip, and Crystal block due to by artificial growth of Sapphire Crystal specifications by limited size far cannot reached many modern optical system of Aperture requirements, to reached its requirements; addition, due to this invention selection has industrial practice in the has is mature and relative cost low of technology phase tie, from smaller of melt body growth of blank production out big area of Sapphire window, can greatly reduced connection cost.
Described above is only optimum implementation of the utility, it should be noted that, for this technical field technicians, on the premise of not from the utility principle, can also make a number of improvements and variants, these improvements and variants are to be considered as the utility model protection.

Source: http://www.ch-microtek.com/