Patent ID: 6321444
Filing Date: 2001-11-27
Classification: H03H,Y10T

Abstract:
A method of fabricating a surface-acoustic-wave (SAW) device comprising:a mounting step of providing an in-process item by flip-chip mounting a SAW chip within a package, said package having a die attachment surface in which a window for characteristics adjustment is provided; anda first adjustment step of adjusting characteristics of the in-process item by an adjustment operation through said window, said first adjustment step including a substep of adjusting characteristics of the in-process item by introducing a gas into said package through said window, whereinsaid gas introduced into said package in said first adjustment step is selected from the group consisting of a gas for etching a substrate of said SAW chip, a gas for etching electrodes on said SAW chip, a gas for changing or adjusting the quality of the electrodes of an insulator film on said SAW chip, a gas for forming a film related to SAW propagation in said SAW chip on a surface of said SAW chip, and a combination of two or more of said gases, wherein said window has an opening smaller than another opening for chip accommodation to house said SAW chip within said package in said mounting step.