Hans Schiesser

Title: Biography of Inventor Hans Schiesser

Introduction

Hans Schiesser is an accomplished inventor based in Fremont, California. He holds two patents that showcase his innovative contributions to technology and manufacturing processes.

Latest Patents

One of his latest patents is for an adjustable shadow mask designed to improve the uniformity of film deposition using multiple monitoring points along the radius of a substrate. This invention involves a vacuum chamber that deposits thin films on a substrate by sputtering a target. The beam of atoms or ions from the target is partially blocked by a shadow or adjustable uniformity mask, which reduces the deposition rate onto the substrate. The adjustable mask features several fingers that can extend or retract to modify the size of the mask, allowing for adjustable deposition rates at different substrate radii. Optical beams monitor the film transmittance at various radii, generating a transmittance profile during deposition. As the process continues, fingers are adjusted to ensure a more uniform film thickness across all radii.

Another significant patent involves a vibratory feeder tray for circuit board fabrication. This apparatus features a low-mass, horizontally-disposed feeder tray with multiple grooves that fit electronic parts. The design includes hollowed-out bottom portions to reduce mass significantly. The parts are picked up one at a time and placed precisely on circuit board substrates by rotating nozzles. An electromagnetic coil operates below the grooves to advance the parts smoothly. The vibratory feeder tray allows for quick delivery