Linh Ba Tran

US Patent:

6783213, Aug 31, 2004

Filed:

Oct 15, 2002

Appl. No.:

10/272519

Inventors:

Hue P. Le - Beaverton OR
Hoi P. Le - Beaverton OR
Thanh P. Le - Beaverton OR
Linh B. Tran - Aloha OR

Assignee:

PicoJet, Inc. - Hillsboro OR

International Classification:

B41J 2045

US Classification:

347 71

Abstract:

There is disclosed a piezoelectric ceramic ink-jet print head and made by an inventive ultrasonic bonding process. Specifically, there are disclosed several improved features of ink jet print heads, including a more cost-effective bonding process using an ultrasonic bonding technique, an improved piezoelectric ceramic crystal pattern, and improved print head-piezoelectric electrical contacts. Further, there is disclosed an ultrasonic bonding process joining metallic objects with ultrasonic energy.

US Patent:

6928731, Aug 16, 2005

Filed:

May 21, 2004

Appl. No.:

10/851309

Inventors:

Hue P. Le - Beaverton OR, US
Hoi P. Le - Beaverton OR, US
Thanh P. Le - Beaverton OR, US
Linh B. Tran - Aloha OR, US

Assignee:

Picojet, Inc. - Hillsboro OR

International Classification:

B21D053/76
B23K001/06

US Classification:

298901, 29 2535, 29843, 29840, 2281101

Abstract:

A piezoelectric ceramic ink-jet print head is made by an inventive ultrasonic bonding process. Specifically, there are several improved features of ink jet print heads, including a more cost-effective bonding process using an ultrasonic bonding technique, an improved piezoelectric ceramic crystal pattern, and improved print head-piezoelectric electrical contacts. Further, there is an ultrasonic bonding process joining metallic objects with ultrasonic energy.

US Patent:

20020060724, May 23, 2002

Filed:

Jul 25, 2001

Appl. No.:

09/916186

Inventors:

Hue Le - Beaverton OR, US
Hoi Le - Beaverton OR, US
Thanh Le - Beaverton OR, US
Linh Tran - Aloha OR, US

International Classification:

B41J002/045

US Classification:

347/071000

Abstract:

A piezoelectric ceramic ink-jet print head is made by ultrasonic bonding processes. Several improved features of ink jet print heads include more cost-effective bonding processes using an ultrasonic bonding technique, an improved piezoelectric ceramic structural element pattern, and improved print head piezoelectric electrical contacts. There is also disclosed an ultrasonic bonding process for joining ceramic and metallic objects.