Microfluid device and ultrasonic bonding process
AssigneePicoJet, Inc.
InventorsHue P. Le, Hoi P. Le, Thanh P. Le, Linh B. Tran
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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.
Claims7
A piezoelectric ceramic pattern having a plurality of cut out piezoelectric ceramic crystals, each piezoelectric ceramic crystal located with an expandable piezoelectric ceramic pattern, wherein the cut out piezoelectric ceramic crystal is in a shape without angled corners, wherein the piezoelectric ceramic pattern is made by a process comprising:
- cutting a flat piezoelectric ceramic plate with a laser programmed to trace the shape without angled corners in a revolution having a starting point and a stopping point extending beyond the starting point, wherein the process of cutting requires a plurality of revolutions;
- randomizing the starting point of each revolution of the plurality of revolutions to form the cut-out shape without the angled corners, and
- repeating the cutting and randomizing steps for each shape without angled corners within the piezoelectric ceramic pattern.
Dependencies are inferred from the claim text.