Elastic wave device and method of producing the same

Details Elastic wave device and method of producing the same Elastic wave device and method of producing the same

2011-01-11

2011-01-11

Dougherty, Thomas M (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S31300R, C310S348000, C310S366000

Reexamination Certificate

active

07868523

ABSTRACT:
An elastic wave device has a structure that prevents cracks from being formed in a piezoelectric substrate in flip-chip bonding using a bump, that minimizes the contact resistance in a contact portion where wiring patterns are electrically connected to each other, and that improves the insertion loss. In the elastic wave device, first and second multilayer electrically conductive films are provided on a piezoelectric substrate, the first multilayer electrically conductive film defines an IDT electrode and a first wiring pattern, the second multilayer electrically conductive film defines an electrode pad to which a bump is connected and a second wiring pattern, at least one contact portion where the second wiring pattern is overlapped on the first wiring pattern so as to be electrically connected to each other is provided, a top electrically conductive film of the first multilayer electrically conductive film is a Ti film, and a bottom electrically conductive film of the second multilayer electrically conductive film is an Al-based electrically conductive film including Al or an alloy mainly containing an Al.

REFERENCES:
patent: RE38278 (2003-10-01), Satoh et al.
patent: 2002/0024271 (2002-02-01), Hori et al.
patent: 2003/0151329 (2003-08-01), Kadota et al.
patent: 2004/0070313 (2004-04-01), Furukawa et al.
patent: 2004/0178698 (2004-09-01), Shimoe et al.
patent: 2004/0256949 (2004-12-01), Hada et al.
patent: 2008/0012450 (2008-01-01), Meister et al.
patent: 2009/0243430 (2009-10-01), Yokota et al.
patent: 1 184 978 (2002-03-01), None
patent: 04-294625 (1992-10-01), None
patent: 2002-043888 (2002-02-01), None
patent: 2002-100951 (2002-04-01), None
patent: 2002-261560 (2002-09-01), None
patent: 2002-531980 (2002-09-01), None
patent: 2003-174056 (2003-06-01), None
patent: 2003-174056 (2003-06-01), None
patent: 2003-188679 (2003-07-01), None
patent: 2005-197595 (2005-07-01), None
patent: 2005-197595 (2005-07-01), None
patent: 2006-115548 (2006-04-01), None
patent: 00/33394 (2000-06-01), None
patent: 2006/058579 (2006-06-01), None
Official Communication issued in International Patent Application No. PCT/JP2008/061837, mailed on Sep. 30, 2008.

Affiliated with

Also associated with

Rating

Elastic wave device and method of producing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Elastic wave device and method of producing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elastic wave device and method of producing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2655786