CHALLENGE 543-HT is a medium viscosity lapping/polishing slurry additive which evenly disperses and suspends a variety of non-suspension-treated abrasives, including aluminum oxide, zirconium oxide, along with silicon carbide, boron carbide, synthetic and natural diamond, and garnet.

Because of its superior suspension characteristics, CHALLENGE 543-HT reduces the amount of abrasive grain needed by up to 50%, while providing equal, and often greater, stock removal rates. 543-HT is particularly effective when using equipment with smaller slurry feed tubes, which constrict flow of high viscosity products.

Directions

CHALLENGE 543-HT should be mixed with deionized water and abrasive using the following slurry formula: 77-82% water,15-18% abrasive, 3-5% CHALLENGE 543-HT.
Use an agitator with a marine type propeller and a motor capable of 1750 RPM.
Use a low shear dispense pump for feeding the mixed slurry onto the lap.
Disperse the abrasive with DI water at 1000 rpm for 3 minutes.
Add 543-HT. Mix for approximately 10 minutes depending upon abrasive surface chemistry. Be careful not to suck air into the slurry when mixing.
A small vortex should form at the surface of the slurry. Turn the mixer off, or to a maximum of 50 rpm.

Suspension-Type Lapping Vehicles

Viscous, biodegradable polymer/surfactant blends that fully suspend abrasives like alumina and silica
Engineered for semiconductor substrates, ceramics, and optics
Maintain suspension and dispersion over long intervals, reducing the need for constant mixing

Our suspension-type lapping slurries, including those in the Vector HTS Series, are biodegradable, viscous polymer/surfactant blends designed to disperse and suspend abrasives like aluminum oxide and silicon dioxide when mixed with de-ionized water. Engineered for the lapping of semiconductor substrates, these slurries fully disperse and suspend abrasive material for extended periods of time with relatively little change in physical or chemical characteristics. Designed for use on all types of lapping plates and tool-sets.

Products within the HTS series have varied chemical and physical properties, resulting in differences in wetting, film strength and viscosity. This allows the formulation to be optimized for any application.