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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
6929713 In-situ photoresist removal by an attachable chamber with light source Aug. 16, 2005
6927168 Method for manufacturing semiconductor device Aug. 9, 2005
6927167 Method for manufacturing semiconductor device having controlled surface roughness Aug. 9, 2005
6927174 Site-specific method for large area uniform thickness plan view transmission electron microscopy sample preparation Aug. 9, 2005
6924235 Sidewall smoothing in high aspect ratio/deep etching using a discrete gas switching method Aug. 2, 2005
6924230 Method for forming a conductive layer Aug. 2, 2005
6924234 Method and apparatus for polishing a copper layer and method for forming a wiring structure using copper Aug. 2, 2005
6919284 Protective tape applying method and apparatus, and protective tape separating method Jul. 19, 2005
6914007 In-situ discharge to avoid arcing during plasma etch processes Jul. 5, 2005
6911346 Method of etching a magnetic material Jun. 28, 2005
6911395 Method of making borderless contacts in an integrated circuit Jun. 28, 2005
6908860 Method for manufacturing semiconductor device and apparatus for manufacturing thereof Jun. 21, 2005
6908859 Low leakage power transistor and method of forming Jun. 21, 2005
6908813 Method of forming tiny silicon nitride spacer for flash EPROM by fully wet etching technology Jun. 21, 2005
6908311 Connection terminal and a semiconductor device including at least one connection terminal Jun. 21, 2005
6905971 Treatment of dielectric material to enhance etch rate Jun. 14, 2005
6902681 Method for plasma etching of high-K dielectric materials Jun. 7, 2005
6893966 Method of patterning the surface of an article using positive microcontact printing May. 17, 2005
6890856 Method for eliminating process byproduct during fabrication of liquid crystal display May. 10, 2005
6890855 Process of removing residue material from a precision surface May. 10, 2005
6887791 Optimization methods for on-chip interconnect geometries suitable for ultra deep sub-micron processes May. 3, 2005
6884677 Recessed gate electrode MOS transistors having a substantially uniform channel length across a width of the recessed gate electrode and methods of forming same Apr. 26, 2005
6881679 Etching solution for etching Cu and Cu/Ti metal layer of liquid crystal display device and method of fabricating the same Apr. 19, 2005
6881677 Method for making a micro-fluid ejection device Apr. 19, 2005
6881127 Method and apparatuses for planarizing microelectronic substrate assemblies Apr. 19, 2005
6878608 Method of manufacture of silicon based package Apr. 12, 2005
6875260 Copper activator solution and method for semiconductor seed layer enhancement Apr. 5, 2005
6875695 System and method for analog replication of microdevices having a desired surface contour Apr. 5, 2005
6872655 Method of forming an integrated circuit thin film resistor Mar. 29, 2005
6872661 Leadless plastic chip carrier with etch back pad singulation and die attach pad array Mar. 29, 2005
6873006 Semiconductor memory array of floating gate memory cells with burried floating gate and pointed channel region Mar. 29, 2005
6872603 Method for forming interconnections including multi-layer metal film stack for improving corrosion and heat resistances Mar. 29, 2005
6869891 Semiconductor device having groove and method of fabricating the same Mar. 22, 2005
6869881 Method for forming passive optical coupling device Mar. 22, 2005
6869880 In situ application of etch back for improved deposition into high-aspect-ratio features Mar. 22, 2005
6869737 Method for exposing a photosensitive resist layer with near-field light Mar. 22, 2005
6869879 Method for forming conductive interconnects Mar. 22, 2005
6867137 Fabrication method for a semiconductor structure having a partly filled trench Mar. 15, 2005
6863836 Method for removal of photoresist using sparger Mar. 8, 2005
6864181 Method and apparatus to form a planarized Cu interconnect layer using electroless membrane deposition Mar. 8, 2005
6864563 Grounding mechanism for semiconductor devices Mar. 8, 2005
6864174 Iteratively selective gas flow control and dynamic database to achieve CD uniformity Mar. 8, 2005
6861758 Structure and manufacturing process of localized shunt to reduce electromigration failure of copper dual damascene process Mar. 1, 2005
6861358 Deposition mask and method of preparing the same Mar. 1, 2005
6858153 Integrated low K dielectrics and etch stops Feb. 22, 2005
6855638 Process to pattern thick TiW metal layers using uniform and selective etching Feb. 15, 2005
6855567 Etch endpoint detection Feb. 15, 2005
6852617 Semiconductor device fabrication method Feb. 8, 2005
6852560 Fabrication of a microchip-based electrospray device Feb. 8, 2005
6852563 Process of fabricating electro-optic polymer devices with polymer sustained microelectrodes Feb. 8, 2005

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