Patent ID: 6513214
Filing Date: 2003-02-04
Classification: H01L,Y10T

Abstract:
A method of producing plural device chips from a thin plate of a pyroelectric material comprising the steps of:forming a device substrate to be treated with a blast of hard particles, said device substrate comprising the thin plate of the pyroelectric material, plural device-forming regions each having an electrode, which are defined on opposite two surfaces of the thin plate, and a circuit pattern formed on each of the opposite two surfaces to electrically connect said electrodes, and each of said device-forming regions being isolated from an adjacent device-forming region by a stock-removal portion; making an electrical connection between the circuit patterns formed on the opposite two surfaces of said device substrate to obtain a 3-dimensional circuit pattern, and grounding said 3-dimensional circuit pattern so that all of said device-forming regions on said device substrate are at the same potential; treating said device substrate having said 3-dimensional circuit pattern with said blast to remove the pyroelectric material of said stock-removal portion, while leaving a bridge portion extending between adjacent device-forming regions and having the circuit patterns thereon, to thereby obtain a device-chip aggregate, in which adjacent device chips are coupled through said bridge portion; and separating said device chip from said device-chip aggregate by removing said bridge portion.