David Tai Wei Wu

US Patent:

6351013, Feb 26, 2002

Filed:

Jul 13, 1999

Appl. No.:

09/352339

Inventors:

Scott Luning - San Francisco CA
David Wu - San Jose CA
Khanh Tran - San Jose CA

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H01L 31062

US Classification:

257368, 257372, 257900, 257369, 438595

Abstract:

The capacitance between the gate electrode and the source/drain regions of a semiconductor device is reduced by forming sub-spacers of a low dielectric constant (K) material at the corners of the gate electrode above the source/drain regions. Subsequently, insulating sidewall spacers are formed over the sub-spacers to shield-shallow source/drain regions from subsequent impurity implantations. The resulting semiconductor device exhibits reduced capacitance between the gate electrode and the source/drain regions, while maintaining circuit reliability.

US Patent:

7650416, Jan 19, 2010

Filed:

Aug 12, 2003

Appl. No.:

10/640459

Inventors:

David Tze-Si Wu - Fremont CA, US
Steven McCanne - Berkeley CA, US

Assignee:

Riverbed Technology - San Francisco CA

International Classification:

G06F 15/16
G06F 15/173

US Classification:

709228, 709227, 709229, 709238, 709239

Abstract:

In a network supporting transactions between clients and servers over a network path having operating characteristics to overcome, data is transported to overcome the operating characteristics using user affinities and dynamic user location information to selectively preload data, or representations, signatures, segments, etc. of data, in order to overcome the one or more operating characteristic. Examples of operating characteristics to overcome include bandwidth limitations, errors and latency. The dynamic location information can be stored in data structures accessible by agents of a data server and the data structures are populated based on user activities with respect to proxies associated with user locations, or the dynamic location information can be obtained implicitly as proxies maintain connections after termination by clients and the use of those maintained connections for preloading of data for the users associated with those clients. The data being preloaded can be protocol-specific data or protocol-independent data.

US Patent:

7704320, Apr 27, 2010

Filed:

May 3, 2004

Appl. No.:

10/838908

Inventors:

David W. M. Marr - Golden CO, US
Tieying Gong - Golden CO, US
David Wu - Golden CO, US

Assignee:

Colorado School of Mines - Golden CO

International Classification:

C30B 30/04

US Classification:

117 68, 117925

Abstract:

The methods provided use external fields such as light and electricity as a means of directing the crystallization of concentrated colloidal systems. Not only can nucleation be directed, crystal melting can be carefully controlled and light-induced crystal diffraction used as a means of directing light propagation. A number of factors play a significant role on the crystallization rate and location, including the intensity of the light field, the magnitude of the electric field, the colloid concentration, the colloid size, and the colloid composition. In varying these parameters, kinetics in these processes are extremely fast when compared to traditional colloidal crystallization approaches.

US Patent:

7853699, Dec 14, 2010

Filed:

Nov 14, 2005

Appl. No.:

11/273861

Inventors:

David Tze-Si Wu - Fremont CA, US
Vivasvat Keswani - Fremont CA, US
Case Larsen - Union City CA, US

Assignee:

Riverbed Technology, Inc. - San Francisco CA

International Classification:

G06F 15/16

US Classification:

709227, 709217

Abstract:

Network proxies reduce server latency in response to series of requests from client applications. Network proxies intercept messages clients and a server. Intercepted client requests are compared with rules. When client requests match a rule, additional request messages are forwarded to the server on behalf of a client application. In response to the additional request messages, the server provides corresponding response messages. A network proxy intercepts and caches the response messages. Subsequent client requests are intercepted by the network application proxy and compared with the cached messages. If a cached response message corresponds with a client request message, the response message is returned to the client application immediately instead of re-requesting the same information from the server. A server-side network proxy can compare client requests with the rules and send additional request messages. The corresponding response messages can be forwarded to a client-side network proxy for caching.

US Patent:

8069225, Nov 29, 2011

Filed:

Aug 12, 2003

Appl. No.:

10/640405

Inventors:

Steven McCanne - Berkeley CA, US
Michael J. Demmer - San Francisco CA, US
Arvind Jain - Santa Clara CA, US
David Tze-Si Wu - Fremont CA, US

Assignee:

Riverbed Technology, Inc. - San Francisco CA

International Classification:

G06F 15/16

US Classification:

709219, 706 21

Abstract:

In a network that conveys requests from clients to servers and responses from servers to clients, a network transaction accelerator for accelerating transactions involving data transfer between at least one client and at least one server over a network comprising a client-side engine, a server-side engine and a transaction predictor configured to predict, based on past transactions, which transactions are likely to occur in the future between the client and server. The transaction predictor might be in the server-side engine, the client-side engine, or both. The client-side engine receives indications of requests from the client, a transaction buffer for storing results of predicted transactions received from the server or the server-side engine ahead of receipt of a corresponding request, and a collator for collating the requests from the client with the stored results or received results, wherein a request and a response that are matched by the collator are identified and the matched response is provided to the client in response to the matched request. The server-side engine receives indications of transactions including requests and responses and conveys requests to the server in response to actual transactions or predicted transactions.

US Patent:

8176186, May 8, 2012

Filed:

Aug 14, 2008

Appl. No.:

12/191514

Inventors:

Steven McCanne - Berkeley CA, US
Michael J. Demmer - San Francisco CA, US
Arvind Jain - Santa Clara CA, US
David Tze-Si Wu - Fremont CA, US
Alfred Landrum - San Francisco CA, US

Assignee:

Riverbed Technology, Inc. - San Francisco CA

International Classification:

G06F 15/16

US Classification:

709228, 709233, 709236

Abstract:

Self-discovering transaction accelerators improve communications between a client and a server. A client directs a message to a server. A client-side transaction accelerator intercepts the message, terminates the connection with the client, and accelerates the request by replacing segments of data with references. The accelerated request is forwarded to a server-side transaction accelerator through a new connection. The server-side transaction accelerator reconstructs the message by replacing the reference with segment data in a persistent segment store accessible to the server-side transaction accelerator. The reconstructed request is then provided to the server. Accelerations may occur in any direction of communication. Persistent segment stores can be pre-populated with segment data from other transaction accelerators and anticipated transactions. The persistent segment store can store segments that are data segmented based on content of the data and can be independent of transaction protocol, application, and device.

US Patent:

8204058, Jun 19, 2012

Filed:

Jul 26, 2006

Appl. No.:

11/494364

Inventors:

David Tze-Si Wu - Fremont CA, US
Soren Lasen - San Francisco CA, US
Nitin Gupta - Fremont CA, US
Vivasvat Keswani - Fremont CA, US

Assignee:

Riverbed Technology, Inc. - Sna Francisco CA

International Classification:

H04L 12/28

US Classification:

370392, 709227

Abstract:

Network traffic is monitored and an optimal framing heuristic is automatically determined and applied. Framing heuristics specify different rules for framing network traffic. While a framing heuristic is applied to the network traffic, alternative framing heuristics are speculatively evaluated for the network traffic. The results of these evaluations are used to rank the framing heuristics. The framing heuristic with the best rank is selected for framing subsequent network traffic. Each client/server traffic flow may have a separate framing heuristic. The framing heuristics may be deterministic based on byte count and/or time or based on traffic characteristics that indicate a plausible point for framing to occur. The choice of available framing heuristics may be determined partly by manual configuration, which specifies which framing heuristics are available, and partly by automatic processes, which determine the best framing heuristic to apply to the current network traffic from the set of available framing heuristics.

US Patent:

8402085, Mar 19, 2013

Filed:

Apr 6, 2012

Appl. No.:

13/441681

Inventors:

Steven McCanne - Berkeley CA, US
Michael J. Demmer - San Francisco CA, US
Arvind Jain - Santa Clara CA, US
David Tze-Si Wu - Fremont CA, US
Alfred Landrum - San Francisco CA, US

Assignee:

Riverbed Technology, Inc. - San Francisco CA

International Classification:

G06F 15/16

US Classification:

709202, 709228, 709233, 709236

Abstract:

Self-discovering transaction accelerators improve communications between a client and a server. A client directs a message to a server. A client-side transaction accelerator intercepts the message, terminates the connection with the client, and accelerates the request by replacing segments of data with references. The accelerated request is forwarded to a server-side transaction accelerator through a new connection. The server-side transaction accelerator reconstructs the message by replacing the reference with segment data in a persistent segment store accessible to the server-side transaction accelerator. The reconstructed request is then provided to the server. Accelerations may occur in any direction of communication. Persistent segment stores can be pre-populated with segment data from other transaction accelerators and anticipated transactions. The persistent segment store can store segments that are data segmented based on content of the data and can be independent of transaction protocol, application, and device.