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Class Information
Number: 438/701
Name: Semiconductor device manufacturing: process > Chemical etching > Combined with coating step > Formation of groove or trench > Tapered configuration
Description: Processes wherein the viahole or trench is formed so as to possess nonparallel sides.


Patents under this class:
1 2 3 4 5 6 7 8 9 10

Patent Number Title Of Patent Date Issued
5759869 Method to imporve metal step coverage by contact reflow Jun. 2, 1998
5753561 Method for making shallow trench isolation structure having rounded corners May. 19, 1998
5746884 Fluted via formation for superior metal step coverage May. 5, 1998
5728608 Tapered dielectric etch in semiconductor devices Mar. 17, 1998
5716218 Process for manufacturing an interconnect for testing a semiconductor die Feb. 10, 1998
5714407 Etching agent, electronic device and method of manufacturing the device Feb. 3, 1998
5714038 Method for forming contact hole of semiconductor device Feb. 3, 1998
5711891 Wafer processing using thermal nitride etch mask Jan. 27, 1998
5700382 Method for fabricating a silicon semiconductor substrate having an integrated waveguide and an optical fiber coupled thereto Dec. 23, 1997
5686339 High dielectric constant capacitor and a fabricating method thereof Nov. 11, 1997
5686337 Method for fabricating stacked capacitors in a DRAM cell Nov. 11, 1997
5683908 Method of fabricating trench isolation structure having tapered opening Nov. 4, 1997
5677242 Process of fabricating semiconductor integrated circuit device having small geometry contact by using spacer on photoresist mask Oct. 14, 1997
5672241 Method of forming metal contact holes in semiconductor fabrication Sep. 30, 1997
5663091 Method for fabricating an electrically programmable antifuse Sep. 2, 1997
5662814 Micro-machining minute hollow using native oxide membrane Sep. 2, 1997
5662768 High surface area trenches for an integrated ciruit device Sep. 2, 1997
5658829 Semiconductor processing method of forming an electrically conductive contact plug Aug. 19, 1997
5652172 Method for controlling the etch profile of an aperture formed through a multi-layer insulator layer Jul. 29, 1997
5633197 Metallization to improve electromigration resistance by etching concavo-concave opening May. 27, 1997
5629237 Taper etching without re-entrance profile May. 13, 1997
5622883 Method for manufacturing semiconductor memory device having landing pad Apr. 22, 1997
5621556 Method of manufacturing active matrix LCD using five masks Apr. 15, 1997
5612252 Method of forming metallization to improve electromigration resistance Mar. 18, 1997
5610090 Method of making a FET having a recessed gate structure Mar. 11, 1997
5605864 Method for forming a semiconductor buried contact with a removable spacer Feb. 25, 1997
5591675 Interconnecting method for semiconductor device Jan. 7, 1997
5580821 Semiconductor processing method of forming an electrically conductive contact plug Dec. 3, 1996
5578528 Method of fabrication glass diaphragm on silicon macrostructure Nov. 26, 1996
5578518 Method of manufacturing a trench isolation having round corners Nov. 26, 1996
5567270 Process of forming contacts and vias having tapered sidewall Oct. 22, 1996
5565381 Method of removing sharp edges in a dielectric coating located above a semiconductor substrate and a semiconductor device formed by this method Oct. 15, 1996
5556797 Method of fabricating a self-aligned double recess gate profile Sep. 17, 1996
5552343 Method for tapered contact formation Sep. 3, 1996
5552342 Method for producing a contact hole in a semiconductor device using reflow and etch Sep. 3, 1996
5550088 Fabrication process for a self-aligned optical subassembly Aug. 27, 1996
5545581 Plug strap process utilizing selective nitride and oxide etches Aug. 13, 1996
5543351 Method of producing electrically insulated silicon structure Aug. 6, 1996
5534452 Method for producing semiconductor device Jul. 9, 1996
5522966 Dry etching process for semiconductor Jun. 4, 1996
5520297 Aperture plate and a method of manufacturing the same May. 28, 1996
5510294 Method of forming vias for multilevel metallization Apr. 23, 1996
5507911 Monolithic micromechanical vibrating string accelerometer with trimmable resonant frequency Apr. 16, 1996
5500080 Process of forming contact holes Mar. 19, 1996
5492868 Capped reflow process to avoid contact autodoping and supress tungsten silicide peeling Feb. 20, 1996
5491100 Method for manufacturing a semiconductor device having a contact window structure Feb. 13, 1996
5484507 Self compensating process for aligning an aperture with crystal planes in a substrate Jan. 16, 1996
5470781 Method to reduce stress from trench structure on SOI wafer Nov. 28, 1995
5470790 Via hole profile and method of fabrication Nov. 28, 1995
5458734 Method of fabricating a semiconductor device Oct. 17, 1995

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