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Class Information
Number: 438/745
Name: Semiconductor device manufacturing: process > Chemical etching > Liquid phase etching
Description: Processes wherein the chemical etchant is in a liquid state when brought into contact with the semiconductive substrate.


Sub-classes under this class:

Class Number Class Name Patents
438/754 Electrically conductive material (e.g., metal, conductive oxide, etc.) 390
438/752 Germanium 100
438/748 Projection of etchant against a moving substrate or controlling the angle or pattern of projected etchant 129
438/749 Sequential application of etchant 150
438/757 Silicon nitride 218
438/756 Silicon oxide 422
438/753 Silicon 427
438/746 Utilizing electromagnetic or wave energy 85
438/747 With relative movement between substrate and confined pool of etchant 143


Patents under this class:
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Patent Number Title Of Patent Date Issued
6255227 Etching process of CoSi2 layers Jul. 3, 2001
6251785 Apparatus and method for polishing a semiconductor wafer in an overhanging position Jun. 26, 2001
6251786 Method to create a copper dual damascene structure with less dishing and erosion Jun. 26, 2001
6251787 Elimination of photo-induced electrochemical dissolution in chemical mechanical polishing Jun. 26, 2001
6251794 Method and apparatus with heat treatment for stripping photoresist to eliminate post-strip photoresist extrusion defects Jun. 26, 2001
6251797 Method of fabricating semiconductor device Jun. 26, 2001
6248670 Method of wet processing Jun. 19, 2001
6245191 Wet etch apparatus Jun. 12, 2001
6245250 Process vessel Jun. 12, 2001
6245581 Method and apparatus for control of critical dimension using feedback etch control Jun. 12, 2001
6245679 Apparatus and methods for chemical-mechanical polishing of semiconductor wafers Jun. 12, 2001
6245680 Circumferentially oscillating carousel apparatus for sequentially processing substrates for polishing and cleaning Jun. 12, 2001
6245684 Method of obtaining a rounded top trench corner for semiconductor trench etch applications Jun. 12, 2001
6242353 Wafer holding head and wafer polishing apparatus, and method for manufacturing wafers Jun. 5, 2001
6242357 Method for forming a deep trench capacitor of a DRAM cell Jun. 5, 2001
6239030 Method of fabricating a trench isolation structure for a semiconductor device May. 29, 2001
6239037 Autoaligned etching process for realizing word lines and improving the reliability of semiconductor integrated memory devices May. 29, 2001
6239038 Method for chemical processing semiconductor wafers May. 29, 2001
6239039 Semiconductor wafers processing method and semiconductor wafers produced by the same May. 29, 2001
6235637 Method for marking a wafer without inducing flat edge particle problem May. 22, 2001
6232139 Method of making suspended thin-film semiconductor piezoelectric devices May. 15, 2001
6232228 Method of manufacturing semiconductor devices, etching composition for manufacturing semiconductor devices, and semiconductor devices made using the method May. 15, 2001
6232232 High selectivity BPSG to TEOS etchant May. 15, 2001
6232239 Method for cleaning contact holes in a semiconductor device May. 15, 2001
6232240 Method for fabricating a capacitor May. 15, 2001
6232241 Pre-oxidation cleaning method for reducing leakage current of ultra-thin gate oxide May. 15, 2001
6228661 Method to determine the dark-to-clear exposure dose for the swing curve May. 8, 2001
6228673 Method of fabricating a surface coupled InGaAs photodetector May. 8, 2001
6228770 Method to form self-sealing air gaps between metal interconnects May. 8, 2001
6225174 Method for forming a spacer using photosensitive material May. 1, 2001
6225225 Method to form shallow trench isolation structures for borderless contacts in an integrated circuit May. 1, 2001
6225232 Semiconductor processing methods, and methods of forming capacitor constructions May. 1, 2001
6225235 Method and device for cleaning and etching individual wafers using wet chemistry May. 1, 2001
6221766 Method and apparatus for processing refractory metals on semiconductor substrates Apr. 24, 2001
6221781 Combined process chamber with multi-positionable pedestal Apr. 24, 2001
6221785 Method for forming shallow trench isolations Apr. 24, 2001
6221786 Methods for isolating interconnects Apr. 24, 2001
6214127 Methods of processing electronic device workpieces and methods of positioning electronic device workpieces within a workpiece carrier Apr. 10, 2001
6214704 Method of processing semiconductor wafers to build in back surface damage Apr. 10, 2001
6211086 Method of avoiding CMP caused residue on wafer edge uncompleted field Apr. 3, 2001
6211090 Method of fabricating flux concentrating layer for use with magnetoresistive random access memories Apr. 3, 2001
6207570 Method of manufacturing integrated circuit devices Mar. 27, 2001
6207572 Reverse linear chemical mechanical polisher with loadable housing Mar. 27, 2001
6204180 Apparatus and process for manufacturing semiconductor devices, products and precursor structures utilizing sorbent-based fluid storage and dispensing system for reagent delivery Mar. 20, 2001
6204182 In-situ fluid jet orifice Mar. 20, 2001
6204185 Method for forming self-align stop layer for borderless contact process Mar. 20, 2001
6200414 Circulation system for supplying chemical for manufacturing semiconductor devices and circulating method thereof Mar. 13, 2001
6200897 Method for manufacturing even dielectric layer Mar. 13, 2001
6200909 Method for selective etching of antireflective coatings Mar. 13, 2001
6197692 Semiconductor wafer planarizing device and method for planarizing a surface of semiconductor wafer by polishing it Mar. 6, 2001

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