“David has strong background in chemistry, chemical engineering, materials science and plasma physics. More importantly, he is able to explain complex phenomena in a clear and understandable way. He has helped us tremendously in our R&D work using various modeling tools.”
Activity
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Putting my Democratic Party hat on, it is a high honor to be a Democratic National Committee Delegate to help pick our next Democratic Presidential…
Putting my Democratic Party hat on, it is a high honor to be a Democratic National Committee Delegate to help pick our next Democratic Presidential…
Liked by David Cohen
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Congratulations to Jennifer Schembri for her promotion to Deputy City Manager! Deputy City Managers play an important role in the leadership of the…
Congratulations to Jennifer Schembri for her promotion to Deputy City Manager! Deputy City Managers play an important role in the leadership of the…
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Special event days during the summer program at the Boys & Girls Clubs of Silicon Valley are some of the best memories I carry from my childhood. It…
Special event days during the summer program at the Boys & Girls Clubs of Silicon Valley are some of the best memories I carry from my childhood. It…
Liked by David Cohen
Licenses & Certifications
Patents
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Minimum contact area wafer clamping with gas flow for rapid wafer cooling
Issued US 8,033,771
Apparatuses and methods for cooling and transferring wafers from low pressure environment to high pressure environment are provided. An apparatus may include a cooling pedestal and a set of supports for holding the wafer above the cooling pedestal. The average gap between the wafer and the cooling pedestal may be no greater than about 0.010 inches. Venting gases may be used to increase the pressure inside the apparatus during the transfer. In certain embodiment, venting gases comprise nitrogen.
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Uniform fluid distribution and exhaust system for a chemical-mechanical planarization device
Issued US 7,918,824
An assembly for a chemical-mechanical polishing process includes a platen having an outer edge, a top surface, and at least one inlet for introducing fluid to the top surface; a manifold system, entrenched in the top surface and in communication with the at least one inlet, for channeling the fluid about the top surface; a polishing pad having a top pad surface, and a plurality of fluid delivery through-holes for introducing the fluid from the manifold system to the top pad surface; and a fluid…
An assembly for a chemical-mechanical polishing process includes a platen having an outer edge, a top surface, and at least one inlet for introducing fluid to the top surface; a manifold system, entrenched in the top surface and in communication with the at least one inlet, for channeling the fluid about the top surface; a polishing pad having a top pad surface, and a plurality of fluid delivery through-holes for introducing the fluid from the manifold system to the top pad surface; and a fluid distribution system, entrenched in the top pad surface and in communication with the through-holes, for substantially uniformly distributing the fluid about the top pad surface. The fluid distribution system includes a set of intersecting first grooves defining an array of lands, each of the first grooves having a first cross sectional area. The fluid distribution system also includes a plurality of second grooves disposed within each of the lands and communicating with the first grooves, each of the second grooves having a second cross sectional area that is smaller than the first cross sectional area.
Other inventorsSee patent -
Water Soluble Abrasive Composition Containing Borax Pentahydrate
Issued US 6,037,316
The invention provides an improved surface safe, aqueous, liquid hard surface cleaner which contains a nonionic surfactant, or combination of nonionic and anionic surfactants, a water soluble abrasive, namely, borax pentahydrate, in an amount which takes at least a portion of the abrasive out of solution, and water.
Other inventorsSee patent
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We are thrilled to announce that our Chief Development Officer, Machelle Locsin, has been named one of Silicon Valley Business Journal's 2024 Women…
We are thrilled to announce that our Chief Development Officer, Machelle Locsin, has been named one of Silicon Valley Business Journal's 2024 Women…
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After nearly 18 years with the City of San Jose I’ve decided to retire. I am proud to have served as Environmental Services Director (ESD) and the…
After nearly 18 years with the City of San Jose I’ve decided to retire. I am proud to have served as Environmental Services Director (ESD) and the…
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A heartfelt thank you to Rob Lloyd for his years of dedicated service to San Jose. Your vast knowledge, thoughtfulness, and visionary leadership have…
A heartfelt thank you to Rob Lloyd for his years of dedicated service to San Jose. Your vast knowledge, thoughtfulness, and visionary leadership have…
Shared by David Cohen
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Groundbreaking for BART phase II extension. We will finally ring the Bay with rail rapid transit.
Groundbreaking for BART phase II extension. We will finally ring the Bay with rail rapid transit.
Shared by David Cohen
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Representing the people at the White House 2nd Juneteenth Concert: Celebrating Community, Culture, and music with Grammy award winning artists with…
Representing the people at the White House 2nd Juneteenth Concert: Celebrating Community, Culture, and music with Grammy award winning artists with…
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Amazing organization - and finally a cool space to call home. Way to go, Steve Wymer, Machelle Locsin and team! #powerofpartnership
Amazing organization - and finally a cool space to call home. Way to go, Steve Wymer, Machelle Locsin and team! #powerofpartnership
Liked by David Cohen
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For the 6th year, the San Jose Police Department raises its pride 🏳️🌈 flag in honor of Pride Month. As part of the LGBTQ+ advisory board, it was…
For the 6th year, the San Jose Police Department raises its pride 🏳️🌈 flag in honor of Pride Month. As part of the LGBTQ+ advisory board, it was…
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Incredibly humbled and honored to named as one of the top 40 AAPI political operatives and public affairs professionals under 40 in the U.S. by…
Incredibly humbled and honored to named as one of the top 40 AAPI political operatives and public affairs professionals under 40 in the U.S. by…
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“Celebrating her Service!” Thanks Representative Anna Eshoo for joining us at Tarana Wireless, Inc. for our Employee Town Hall. We greatly value your…
“Celebrating her Service!” Thanks Representative Anna Eshoo for joining us at Tarana Wireless, Inc. for our Employee Town Hall. We greatly value your…
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The most rewarding thing I did this year was coach my daughter’s tee ball team. I started the season worried about practice plans and ended just…
The most rewarding thing I did this year was coach my daughter’s tee ball team. I started the season worried about practice plans and ended just…
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