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CPC
C23C14/58

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CCHEMISTRY METALLURGY C23Surface treatment C23CCOATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material

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C23C14/58After-treatment

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Patents Grantslast 30 patents

Information Patent Grant
Multicolor fixture finishes
- Patent number 12,366,006
- Issue date Jul 22, 2025
- Kohler Co.
- Sarfaraz Moh
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Ion beam etching chamber with etching by-product redistributor
- Patent number 12,362,154
- Issue date Jul 15, 2025
- Taiwan Semiconductor Manufacturing Company, Ltd
- Te-Hsien Hsieh
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Film deposition apparatus and film deposition method
- Patent number 12,359,302
- Issue date Jul 15, 2025
- Tokyo Electron Limited
- Manabu Honma
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method for producing ferroelectric film, ferroelectric film, and us...
- Patent number 12,359,300
- Issue date Jul 15, 2025
- Tokyo Institute of Technology
- Hiroshi Funakubo
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Particle removal during fabrication of electrochromic devices
- Patent number 12,360,425
- Issue date Jul 15, 2025
- View Operating Corporation
- Robert T. Rozbicki
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Durable, optically transparent, and superhydrophobic coating
- Patent number 12,338,524
- Issue date Jun 24, 2025
- Waymo LLC
- John T. Simpson
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method for patterning a substrate, a method for forming a microstru...
- Patent number 12,338,523
- Issue date Jun 24, 2025
- Craif Inc.
- Keishu Tsuda
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
CuV2O6-based photoelectric sensor and application thereof in detect...
- Patent number 12,332,207
- Issue date Jun 17, 2025
- Institute of Analysis, Guangdong Academy of Sciences (China National Analytic...
- Fuxian Wang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method for manufacturing a composite structure comprising a thin la...
- Patent number 12,320,031
- Issue date Jun 3, 2025
- Soitec
- Hugo Biard
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method for producing coating with colored surface
- Patent number 12,320,026
- Issue date Jun 3, 2025
- OERLIKON SURFACE SOLUTIONS AG, PFAFFIKON
- Sven Matthias Twardy
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method of fabricating silicon carbide material by performing a firs...
- Patent number 12,319,581
- Issue date Jun 3, 2025
- GlobalWafers Co., Ltd.
- Ching-Shan Lin
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Decorative object
- Patent number 12,319,997
- Issue date Jun 3, 2025
- The Swatch Group Research and Development Ltd.
- Christian Manasterski
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method for producing thin film, thin film forming material, optical...
- Patent number 12,306,374
- Issue date May 20, 2025
- Nichia Corporation
- Gentaro Tanaka
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
P-type gallium oxide film, and preparation method and application t...
- Patent number 12,297,527
- Issue date May 13, 2025
- HUBEI UNIVERSITY
- Yunbin He
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Stents having a hybrid pattern and methods of manufacture
- Patent number 12,290,458
- Issue date May 6, 2025
- Vactronix Scientific, LLC.
- Armando Garza
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method for producing nitride semiconductor photoelectrode
- Patent number 12,286,718
- Issue date Apr 29, 2025
- Nippon Telegraph and Telephone Corporation
- Yuya Uzumaki
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Heterostructured thin-film catalysts comprising nanocavities
- Patent number 12,286,715
- Issue date Apr 29, 2025
- University of Central Florida Research Foundation, Inc.
- Yang Yang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Packaging material for non-destructive detection of food quality, p...
- Patent number 12,280,929
- Issue date Apr 22, 2025
- Zhejiang University
- Lijuan Xie
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Selective deposition of carbon on photoresist layer for lithography...
- Patent number 12,283,484
- Issue date Apr 22, 2025
- Applied Materials, Inc.
- Nancy Fung
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method for decorating a mechanical part
- Patent number 12,279,679
- Issue date Apr 22, 2025
- Rubattel & Weyermann S.A.
- Frédéric Jeanrenaud
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method for joining transparent substrates
- Patent number 12,275,670
- Issue date Apr 15, 2025
- Tadatomo Suga
- Tadatomo Suga
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Engineered multi-dimensional metallurgical properties in PVD materials
- Patent number 12,276,017
- Issue date Apr 15, 2025
- Vactronix Scientific, LLC.
- Scott P. Carpenter
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
System and method to map thickness variations of substrates in manu...
- Patent number 12,276,490
- Issue date Apr 15, 2025
- Applied Materials, Inc.
- Mehdi Vaez-Iravani
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Thin film structure including dielectric material layer, method of...
- Patent number 12,276,026
- Issue date Apr 15, 2025
- Samsung Electronics Co., Ltd.
- Bo-Eun Park
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Physical vapor deposition coating layer combination for color devel...
- Patent number 12,275,350
- Issue date Apr 15, 2025
- GM Global Technology Operations LLC
- Woo-Sung Bae
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Wafer chuck structure with holes in upper surface to improve temper...
- Patent number 12,272,585
- Issue date Apr 8, 2025
- Taiwan Semiconductor Manufacturing Company, Ltd
- Ting-Jung Chen
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Self-powered ultraviolet photodetection performance using Au/Ta2O5/...
- Patent number 12,268,033
- Issue date Apr 1, 2025
- United Arab Emirates University
- Sambasivam Sangaraju
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Growth method of highly twinned SiGe alloy on the basal plane of tr...
- Patent number 12,252,780
- Issue date Mar 18, 2025
- UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF NASA.
- Hyun Jung Kim
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Metal foil with carrier
- Patent number 12,247,280
- Issue date Mar 11, 2025
- Mitsui Mining & Smelting Co., Ltd.
- Yukiko Kitabatake
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Optical filter and method for manufacturing same
- Patent number 12,248,161
- Issue date Mar 11, 2025
- Nippon Electric Glass Co., Ltd.
- Keiichi Sahara
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...

Patents Applicationslast 30 patents

Information Patent Application
VACUUM TREATMENT APPARATUS AND VACUUM TREATMENT METHOD
- Publication number 20250236946
- Publication date Jul 24, 2025
- ULVAC, Inc.
- Takahito KIMOTO
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
VAPOUR NOZZLE FOR PVD
- Publication number 20250236948
- Publication date Jul 24, 2025
- ARCELORMITTAL
- Vincent RUWET
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
INCREASED ETCH RESISTANCE OF NITRIDE LAYERS USING CHEMICAL VAPOR DE...
- Publication number 20250226211
- Publication date Jul 10, 2025
- Applied Materials, Inc.
- Rajesh PRASAD
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
SELECTIVE DEPOSITION OF CARBON ON PHOTORESIST LAYER FOR LITHOGRAPHY...
- Publication number 20250226221
- Publication date Jul 10, 2025
- Applied Materials, Inc.
- NANCY FUNG
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
SYSTEM AND METHOD TO MAP THICKNESS VARIATIONS OF SUBSTRATES IN MANU...
- Publication number 20250224228
- Publication date Jul 10, 2025
- Applied Materials, Inc.
- Mehdi Vaez-Iravani
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
ELECTRONIC DEVICE COMPRISING HOUSING
- Publication number 20250220098
- Publication date Jul 3, 2025
- Samsung Electronics Co., Ltd.
- Kidoc SON
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
MULTI-METAL OXIDE COATINGS, RELATED DEVICES AND METHODS
- Publication number 20250215548
- Publication date Jul 3, 2025
- Entegris, Inc.
- Baosheng Sang
- C01 - INORGANIC CHEMISTRY
Information Patent Application
Growth Method of Highly Twinned SiGe Alloy on the Basal Plane of Tr...
- Publication number 20250215552
- Publication date Jul 3, 2025
- United States of America as represented by the Administrator of NASA
- Hyun Jung Kim
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
APATHOGENIC COATING OF AN OBJECT, OBJECT HAVING THE APATHOGENIC COA...
- Publication number 20250205396
- Publication date Jun 26, 2025
- SIEMENS AKTIENGESELLSCHAFT
- Gabriele Winkler
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Application
BLACK OXIDIZED SURFACES
- Publication number 20250197988
- Publication date Jun 19, 2025
- VAPOR TECHNOLOGIES, INC.
- Bryce Randolph ANTON
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
DRYING AND CRYSTALLIZING PEROVSKITE LAYERS FROM SOLVENT COATED FILMS
- Publication number 20250204139
- Publication date Jun 19, 2025
- Caelux Corporation
- Ernest F. Hasselbrink
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
THIN-FILM LIQUID METAL ELECTRODE, ITS FABRICATING METHOD USING SEQU...
- Publication number 20250201438
- Publication date Jun 19, 2025
- Korea Advanced Institute of Science and Technology
- Jung-Yong Lee
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
SEMICONDUCTOR THIN FILM COMPRISING INDIUM-SELENIDE COMPOUND, THIN F...
- Publication number 20250191915
- Publication date Jun 12, 2025
- POSTECH Research and Business Development Foundation
- Yong-Young NOH
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
METALLIC SHEET WITH DEPOSITED STRUCTUTRED IMAGES AND METHODS OF MAN...
- Publication number 20250179647
- Publication date Jun 5, 2025
- Valaurum, Inc.
- Laurie Johansen
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Boron-Based and High-Entropy Magnetic Materials
- Publication number 20250182963
- Publication date Jun 5, 2025
- GEORGETOWN UNIVERSITY
- Kai Liu
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
STRESS CONTROL METHOD FOR PHYSICAL VAPOR DEPOSITION OF ALUMINUM
- Publication number 20250171887
- Publication date May 29, 2025
- Applied Materials, Inc.
- Yaoying Zhong
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
PROCESS FOR PRE-LITHIATION AND EQUIPMENT FOR IMPLEMENTING THE SAME
- Publication number 20250167197
- Publication date May 22, 2025
- Ulvac, Inc.
- Akiyoshi SUZUKI
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
LITHIUM SECONDARY BATTERY AND PREPARATION METHOD THEREFOR
- Publication number 20250158011
- Publication date May 15, 2025
- Shenzhen Huineng Energy Storage Materials Engineering Research Center Co., LTD.
- Faping ZHONG
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Ti MATERIAL FOR FUEL CELL SEPARATOR AND METHOD OF MANUFACTURING THE...
- Publication number 20250158085
- Publication date May 15, 2025
- Hyundai Motor Company
- Dong-Jae Choi
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
FILM FORMATION APPARATUS AND FILM FORMATION METHOD OF GALLIUM NITRI...
- Publication number 20250146127
- Publication date May 8, 2025
- Japan Display Inc.
- Masanobu IKEDA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
DEPOSITION SYSTEM AND METHOD FOR DISPLAY APPARATUS
- Publication number 20250137116
- Publication date May 1, 2025
- SAMSUNG DISPLAY CO., LTD.
- Jaewan SEOL
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
POWER COMPONENT SUBMOUNT AND MANUFACTURING METHOD THEREOF
- Publication number 20250142730
- Publication date May 1, 2025
- TONG HSING ELECTRONIC INDUSTRIES, LTD.
- Jia-Zheng Xu
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
PREPARATION METHOD OF BISMUTH OXIDE FILM AND RECONFIGURABLE PHOTOEL...
- Publication number 20250119144
- Publication date Apr 10, 2025
- INSTITUTE OF ANALYSIS, GUANGDONG ACADEMY OF SCIENCES (CHINA NATIONAL ANALYTIC...
- Fuxian WANG
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
FABRICATION METHODS FOR 3D STRUCTURES BASED ON ROLLING-UP KIRIGAMI...
- Publication number 20250109487
- Publication date Apr 3, 2025
- City University of Hong Kong
- Lixin Dong
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
ARTICLES COATED WITH CRACK-RESISTANT FLUORO-ANNEALED FILMS AND METH...
- Publication number 20250109483
- Publication date Apr 3, 2025
- Entegris, Inc.
- Nilesh Gunda
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Method for Improved Heavy Metal Wetting on a Surface
- Publication number 20250109476
- Publication date Apr 3, 2025
- UChicago Argonne, LLC
- Sumit Bhattacharya
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
HEATING DEVICE AND METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM
- Publication number 20250101574
- Publication date Mar 27, 2025
- Resonac Corporation
- Gohei KUROKAWA
- G11 - INFORMATION STORAGE
Information Patent Application
DECORATIVE PVD COATED ITEMS AND RADOMES AND METHODS OF MAKING SAME
- Publication number 20250083597
- Publication date Mar 13, 2025
- MOTHERSON INNOVATIONS COMPANY LIMITED
- Dean Caruso
- B60 - VEHICLES IN GENERAL
Information Patent Application
METHOD FOR MANUFACTURING ELECTRET MATERIAL
- Publication number 20250075310
- Publication date Mar 6, 2025
- Toyota Jidosha Kabushiki Kaisha
- Kenichi OKUMURA
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
CERAMIC PARTICUALTE COATING FOR WEAR IMPROVEMENT
- Publication number 20250075759
- Publication date Mar 6, 2025
- GOODRICH CORPORATION
- JECEE JARMAN
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...

After-treatment

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Multicolor fixture finishes

Ion beam etching chamber with etching by-product redistributor

Film deposition apparatus and film deposition method

Method for producing ferroelectric film, ferroelectric film, and us...

Particle removal during fabrication of electrochromic devices

Durable, optically transparent, and superhydrophobic coating

Method for patterning a substrate, a method for forming a microstru...

CuV2O6-based photoelectric sensor and application thereof in detect...

Method for manufacturing a composite structure comprising a thin la...

Method for producing coating with colored surface

Method of fabricating silicon carbide material by performing a firs...

Decorative object

Method for producing thin film, thin film forming material, optical...

P-type gallium oxide film, and preparation method and application t...

Stents having a hybrid pattern and methods of manufacture

Method for producing nitride semiconductor photoelectrode

Heterostructured thin-film catalysts comprising nanocavities

Packaging material for non-destructive detection of food quality, p...

Selective deposition of carbon on photoresist layer for lithography...

Method for decorating a mechanical part

Method for joining transparent substrates

Engineered multi-dimensional metallurgical properties in PVD materials

System and method to map thickness variations of substrates in manu...

Thin film structure including dielectric material layer, method of...

Physical vapor deposition coating layer combination for color devel...

Wafer chuck structure with holes in upper surface to improve temper...

Self-powered ultraviolet photodetection performance using Au/Ta2O5/...

Growth method of highly twinned SiGe alloy on the basal plane of tr...

Metal foil with carrier

Optical filter and method for manufacturing same

Patents Applicationslast 30 patents

VACUUM TREATMENT APPARATUS AND VACUUM TREATMENT METHOD

VAPOUR NOZZLE FOR PVD

INCREASED ETCH RESISTANCE OF NITRIDE LAYERS USING CHEMICAL VAPOR DE...

SELECTIVE DEPOSITION OF CARBON ON PHOTORESIST LAYER FOR LITHOGRAPHY...

SYSTEM AND METHOD TO MAP THICKNESS VARIATIONS OF SUBSTRATES IN MANU...

ELECTRONIC DEVICE COMPRISING HOUSING

MULTI-METAL OXIDE COATINGS, RELATED DEVICES AND METHODS

Growth Method of Highly Twinned SiGe Alloy on the Basal Plane of Tr...

APATHOGENIC COATING OF AN OBJECT, OBJECT HAVING THE APATHOGENIC COA...

BLACK OXIDIZED SURFACES

DRYING AND CRYSTALLIZING PEROVSKITE LAYERS FROM SOLVENT COATED FILMS

THIN-FILM LIQUID METAL ELECTRODE, ITS FABRICATING METHOD USING SEQU...

SEMICONDUCTOR THIN FILM COMPRISING INDIUM-SELENIDE COMPOUND, THIN F...

METALLIC SHEET WITH DEPOSITED STRUCTUTRED IMAGES AND METHODS OF MAN...

Boron-Based and High-Entropy Magnetic Materials

STRESS CONTROL METHOD FOR PHYSICAL VAPOR DEPOSITION OF ALUMINUM

PROCESS FOR PRE-LITHIATION AND EQUIPMENT FOR IMPLEMENTING THE SAME

LITHIUM SECONDARY BATTERY AND PREPARATION METHOD THEREFOR

Ti MATERIAL FOR FUEL CELL SEPARATOR AND METHOD OF MANUFACTURING THE...

FILM FORMATION APPARATUS AND FILM FORMATION METHOD OF GALLIUM NITRI...

DEPOSITION SYSTEM AND METHOD FOR DISPLAY APPARATUS

POWER COMPONENT SUBMOUNT AND MANUFACTURING METHOD THEREOF

PREPARATION METHOD OF BISMUTH OXIDE FILM AND RECONFIGURABLE PHOTOEL...

FABRICATION METHODS FOR 3D STRUCTURES BASED ON ROLLING-UP KIRIGAMI...

ARTICLES COATED WITH CRACK-RESISTANT FLUORO-ANNEALED FILMS AND METH...

Method for Improved Heavy Metal Wetting on a Surface

HEATING DEVICE AND METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM

DECORATIVE PVD COATED ITEMS AND RADOMES AND METHODS OF MAKING SAME

METHOD FOR MANUFACTURING ELECTRET MATERIAL

CERAMIC PARTICUALTE COATING FOR WEAR IMPROVEMENT