Patent ID: 11955250
Assignee: nan
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC G | IPC G

Claim 7:
8. An X-ray, gamma ray, charged particle and/or thermal neutron collimator device comprising:
At least two semiconductor substrates or host wafers positioned on the top of each other,
Wherein semiconductor substrates are having an arrays of substantially uniform parallel hollow pores there through, the pores having characteristic lateral dimensions in the plane of the host wafers substantially different between at least two host wafers by at least a factor of two between each pair of host wafers,
Wherein the pores in semiconductor substrates are within the range of from about 0.1 μm to about 20 μm,
said host wafers having first and second surfaces substantially perpendicular to the axis of the pores,
the thicknesses of semiconductor substrates are within the range of from about 50 μm to about 750 μm.