It is now feasible to build a thermionic emitter (electron gun) with 25 to 50 times greater precision of electrode formand position than has been conventionally achievable. lehrer-pearson, inc., (lp) will do this by using a design concept (patent pending) that allows, for the first time, high… More

It is now feasible to build a thermionic emitter (electron gun) with 25 to 50 times greater precision of electrode form and position than has been cnventionally achieveable. lehrer- pearson, inc., (lp) will do this using a design concept (patent pending) that allows, for the first time, high… More

Use of a special, high stiffness precision turning machine with a polycrystal cubic boron nitride tool bit promises to allow cathode emitter surface finishing free, or at least freer, of the smearing, tearing, and plastic flow of cathode material (sintered tungsten) common to conventional process.… More

Vhsic integrated circuitry can be made with better repeatability better yield and lower cost using gaas wafers with better flattness, parallelism and reduced crystal damage. micromachining is a promising wafer fabrication process to achieve the desired vhsic integrated circuitry improvements.

Micromachining gaas wafers hold promise of flatter wafers, with better parallelism (uniformity of thickness), which in turn promises better yield and circuitry repeatability. moreover, the same process can be used to provide better control of post-circuitry thinning. experiments will be conducted to… More