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Class Information
Number: 438/689
Name: Semiconductor device manufacturing: process > Chemical etching
Description: Processes having a step of removing material from a semiconductor substrate through the action of a chemical agent, wherein the intent is to use the electrical properties of the semiconductor for at least one of the purposes outlined in section I, C, of the class definition for this class (438).


Sub-classes under this class:

Class Number Class Name Patents
438/705 Altering etchability of substrate region by compositional or crystalline modification 345
438/694 Combined with coating step 901
438/690 Combined with the removal of material by nonchemical means (e.g., ablating, abrading, etc.) 485
438/704 Having liquid and vapor etching steps 425
438/745 Liquid phase etching 1,163
438/706 Vapor phase etching (i.e., dry etching) 1,331


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Patent Number Title Of Patent Date Issued
7326635 Method and apparatus for stripping photo-resist Feb. 5, 2008
7323416 Method and composition for polishing a substrate Jan. 29, 2008
7323414 Method for polishing a substrate surface Jan. 29, 2008
7323413 Method for stripping silicon nitride Jan. 29, 2008
7323115 Substrate processing method and ink jet recording head substrate manufacturing method Jan. 29, 2008
7323114 Method of making optical elements for an optical disc system Jan. 29, 2008
7323111 Angle control of multi-cavity molded components for MEMS and NEMS group assembly Jan. 29, 2008
7316975 Method of forming sidewall spacers Jan. 8, 2008
7314803 Method for producing a semiconductor structure Jan. 1, 2008
7313863 Method to form a cavity having inner walls of varying slope Jan. 1, 2008
7312152 Lactate-containing corrosion inhibitor Dec. 25, 2007
7312162 Low temperature plasma deposition process for carbon layer deposition Dec. 25, 2007
7309652 Method for removing photoresist layer and method for forming metal line in semiconductor device using the same Dec. 18, 2007
7307020 Membrane 3D IC fabrication Dec. 11, 2007
7307019 Method for supercritical carbon dioxide processing of fluoro-carbon films Dec. 11, 2007
7300874 Chemical mechanical polishing compositions and methods relating thereto Nov. 27, 2007
7297287 Method and apparatus for endpoint detection using partial least squares Nov. 20, 2007
7297636 Methods for fabricating device features having small dimensions Nov. 20, 2007
7292906 Formula-based run-to-run control Nov. 6, 2007
7291560 Method of production pitch fractionizations in semiconductor technology Nov. 6, 2007
7291559 Etching method, gate etching method, and method of manufacturing semiconductor devices Nov. 6, 2007
7288482 Silicon nitride etching methods Oct. 30, 2007
7285495 Methods for thermally treating a semiconductor layer Oct. 23, 2007
7285499 Polymer spacers for creating sub-lithographic spaces Oct. 23, 2007
7282449 Thermal treatment of a semiconductor layer Oct. 16, 2007
7282447 Method for an integrated circuit contact Oct. 16, 2007
7282446 Method of manufacturing self-ordered nanochannel-array and method of manufacturing nanodot using the nanochannel-array Oct. 16, 2007
7282448 Substrate and method of forming substrate for fluid ejection device Oct. 16, 2007
7279398 Microfeature workpiece processing apparatus and methods for controlling deposition of materials on microfeature workpieces Oct. 9, 2007
7279112 Method of manufacture of smart microfluidic medical device with universal coating Oct. 9, 2007
7279108 Method for the manufacture of printed circuit boards with plated resistors Oct. 9, 2007
7278210 Method for producing a 3-D microscope flow-through cell Oct. 9, 2007
7277214 Tiltable-body apparatus, and method of fabricating the same Oct. 2, 2007
7276445 Method for forming pattern using printing method Oct. 2, 2007
7273732 Systems and methods for nanowire growth and harvesting Sep. 25, 2007
7273815 Etch features with reduced line edge roughness Sep. 25, 2007
7271099 Forming a conductive pattern on a substrate Sep. 18, 2007
7271098 Method of fabricating a desired pattern of electronically functional material Sep. 18, 2007
7271082 Method of manufacturing a semiconductor device Sep. 18, 2007
7271057 Memory array with overlapping buried digit line and active area and method for forming same Sep. 18, 2007
7270760 Method and apparatus for simulating standard test wafers Sep. 18, 2007
7268079 Method for fabricating a semiconductor having a field zone Sep. 11, 2007
7268080 Method for printing contacts on a substrate Sep. 11, 2007
7265053 Trench photolithography rework for removal of photoresist residue Sep. 4, 2007
7261829 Method for masking a recess in a structure having a high aspect ratio Aug. 28, 2007
7262078 Method of forming a wear-resistant dielectric layer Aug. 28, 2007
7259107 Method of forming isolated features of semiconductor devices Aug. 21, 2007
7256126 Pitch reduction integrating formation of memory array and peripheral circuitry Aug. 14, 2007
7256094 Method for changing threshold voltage of device in resist asher Aug. 14, 2007
7255801 Deep submicron CMOS compatible suspending inductor Aug. 14, 2007

1 2 3 4 5 6 7 8 9 10 11 12 13 14


 
 
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