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Patent No. 5421089

Fork With Timer

A fork with timer for providing a cue to a user after an elapsed period of time for indicating that another bite of food using the fork may be taken.

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Class 438/43 - Tapered etching


Subclass of Class 438 - Semiconductor device manufacturing: process
Definition: Process wherein the material removal step is by etching
No. of patents: 166
Last issue date: 05/08/2012


        5  
NumberTitleIssue Date
4137107Method of manufacturing a semiconductor device utilizing selective masking, deposition and etching
The invention relates to a method in which a system of layers with a contact layer of gallium arsenide is formed epitaxially. In a second epitaxy treatment a layer of gallium aluminum arsenide is formed selectively. In order not to form the latter layer o...
01/30/1979
4099999Method of making etched-striped substrate planar laser
A method of making a diode laser in which a pump current confining channel is formed on the substrate side of a diode laser prior to growth of the active or recombination region of the diode laser. The current confining channel is formed by providing, by ...
07/11/1978
4033796Method of making buried-heterostructure diode injection laser
A method of making a buried-heterostructure (BH) diode injection laser capable of operating at low room temperature thresholds and in the lowest order TE, TM, or TEM modes. Following formation of a pump current confining layer in a substrate, an elongated...
07/05/1977
4029531Method of forming grooves in the [011] crystalline direction
An A-B etchant is applied to a (100) surface of a body of semiconductor material, a portion of which along the (100) surface of the body is either gallium arsenide or gallium aluminum arsenide. The etchant is applied for at least 15 seconds at a temperatu...
06/14/1977
3998672Method of producing infrared luminescent diodes
A recess is formed in one of the principal surfaces of an N-type substrate of GaAs. Through the liquid phase growth technique, a silicon-doped N-type GaAs layer is formed on the one of the principal surfaces and on the surface of the recess and a silicon-...
12/21/1976
3978428Buried-heterostructure diode injection laser
A buried-heterostructure (BH) diode injection laser capable of operating at low room temperature thresholds and in the lowest order TE, TM or TEM modes. The laser has an elongated groove in a substrate with the groove extending through a pump current conf...
08/31/1976
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