10X Faster Sapphire, SiC, GaN Wafer Abrading
Long Abrasive Disc Abrade Life
Vitrified Diamond Abrasive Agglomerates
Use of fixed-abrasive island discs allows sapphire to be polished 10X faster than conventional liquid abrasive slurry polishing.
Keltech has the only system in the world that does high-speed abrasive polishing of sapphire.
6” Island Disc Samples
Phone
Camera
Lenses
Watch
Crystals
LED
Wafers
Semiconductor
Wafers
Industrial
Seals
Diamond Abrasive Agglomerate Island Discs Provide High Wafer Cut Rates
Vitrified diamond agglomerate abrasive island discs are used at very high abrading speeds to provide extraordinary high 10X Faster cut rates of sapphire and SiC wafers. ​
Wafer Polishing Cost Savings
The high-speed wafer polishing system provides very substantial cost savings.
First, abrading time can be reduced by a factor of 10X, or more.
Second, all of the expensive fixed-abrasive diamond particles are fully utilized as they progressively wear down.
"Partner" With Keltech
Keltech is looking for Partners that will produce and supply the high-speed diamond abrasive island discs, the porous agglomerate grinding wheels and abrasive polishing machines.
Complete Description Of The Production Of The Island Discs
All aspects of making vitrified diamond agglomerates, and also, making the island discs are described in detail.
Vitrified Sapphire High Cut Rates And Long Island-Disc Abrade Life
Abrade tests on 2” sapphire wafers using a 6” island disc operating at 1,000 RPM resulted in an averaged very high 0.0026 inch/minute wafer cut rate.
These abrade tests also confirmed the island discs long abrade life.
Abrasive Islands Prevent Workpiece Hydroplaning
Hydroplaning of water-spray cooled wafers at high speeds is avoided with the use of fixed-abrasive islands that are bonded to flexible polymer discs.
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Conventional liquid abrasive slurries cannot operate at high speeds without causing hydroplaning.
Verified Diamond Abrasive Particle Agglomerates
During vitrification, diamond abrasive particles and glass powder are melted together in a furnace and split into agglomerates that are molded into islands attached in annular bands on flexible polymer discs.
Porous Bead Filler Between Islands Cools Wafers
Use of a porous bead filler between islands provides a thin film of water that coats the wafer abraded surface and cools it during abrading action.
Also, the island bead filler is a very distinctive visual feature of these island discs.
100% Utilized Diamond Fixed-Abrasive Particles
Expensive diamond abrasive particles rigidly encapsulated in the agglomerates are slowly worn down by wafer abrading action until new diamond particles are exposed.
Each individual diamond particle is fully utilized.
Wide Range of Island Disc Sizes
Expensive diamond abrasive particles rigidly encapsulated in the agglomerates are slowly worn down by wafer abrading action until new diamond particles are exposed.
Each individual diamond particle is fully utilized.
Island Discs used Together WITH abrasive Slurry Wafer Polishing
Island discs can be used to initially flatten sliced wafers and “rough” polish them. Then, conventional abrasive slurry can be used to finish-polish the wafers.
Low-Speed Island Discs For Existing Slurry Lapping Machines
“Soft” diamond abrasive agglomerates are used to make island discs that erode easily at low speeds and low abrade forces. These fixed-abrasive discs can be used on the many existing slurry lapper machines.
Grinding Wheels With Vitrified Diamond Agglomerates
The same vitrified diamond abrasive agglomerates used to make the island discs can also be used to make porous grinding wheels.
Keltech NOT PROVIDE Lapping Machines
Multiple machine builders will provide the abrasive lapping machines that utilize the Keltech vitrified diamond agglomerate island discs.
Samples of 6" Vitrified Diamond Agglomerate Island Discs
Keltech will supply you with a sample 6” vitrified diamond agglomerate island disc.
It can be used to abrade your 2” sapphire, SiC or GaN wafer at high abrading speeds using a simple wafer polishing set-up on one of your standard shop milling machines.
