Charles K Chiang

US Patent:

6869531, Mar 22, 2005

Filed:

Oct 25, 2002

Appl. No.:

10/279235

Inventors:

Charles N. Chiang - Monterey Park CA, US

International Classification:

C02F001/40

US Classification:

2102423, 210307, 210514, 210470, 99496, 99508, 30325

Abstract:

A fluid filter, which is adapted for separating a less dense fluid floating on a high dense fluid, includes at least a fluid filtering arrangement including a floating wing adapted for floating on the less dense fluid and at least a fluid outlet formed on the floating wing, and a container body, which is extended from the floating wing, having a fluid collecting cavity communicating with the fluid outlet, wherein the fluid outlet is formed at a position above the fluid collecting cavity. Therefore, when a downward force is applied on the floating wing until the fluid outlet is slightly positioned below the surface level of the less dense fluid, the less dense fluid is allowed to flow into the fluid collecting cavity through the fluid outlet by gravity.

US Patent:

7273548, Sep 25, 2007

Filed:

Apr 8, 2005

Appl. No.:

11/102457

Inventors:

Charles N. Chiang - Monterey Park CA, US

International Classification:

E02B 15/04

US Classification:

210187, 2102423, 210519, 210538, 210923

Abstract:

A fluid filter, which is adapted for separating a less dense fluid floating on a high dense fluid, includes at least a fluid filtering arrangement including a floating wing adapted for floating on the less dense fluid and at least a fluid outlet formed on the floating wing, and a container body, which is extended from the floating wing, having a fluid collecting cavity communicating with the fluid outlet, wherein the fluid outlet is formed at a position above the fluid collecting cavity. Therefore, when a downward force is applied on the floating wing until the fluid outlet is slightly positioned below a surface level of the less dense fluid, the less dense fluid is allowed to flow into the fluid collecting cavity through the fluid outlet by gravity.

US Patent:

7594213, Sep 22, 2009

Filed:

Nov 24, 2004

Appl. No.:

10/997396

Inventors:

Xin Wang - Pasadena CA, US
Charles C. Chiang - San Jose CA, US
Jamil Kawa - Campbell CA, US

Assignee:

Synopsys, Inc. - Mountain View CA

International Classification:

G06F 17/50

US Classification:

716 10, 716 2, 716 4, 716 19, 716 21

Abstract:

One embodiment of the present invention provides a system that computes dummy feature density for a CMP (Chemical-Mechanical Polishing) process. Note that the dummy feature density is used to add dummy features to a layout to reduce the post-CMP topography variation. During operation, the system discretizes a layout of an integrated circuit into a plurality of panels. Next, the system computes a feature density and a slack density for the plurality of panels. The system then computes a dummy feature density for the plurality of panels by, iteratively, (a) calculating an effective feature density for the plurality of panels using the feature density and a function that models the CMP process, (b) calculating a filling amount for a set of panels in the plurality of panels using a target feature density, the effective feature density, and the slack density, and (c) updating the feature density, the slack density, and the dummy feature density for the set of panels using the filling amount. In one embodiment of the present invention, the iterative process is guided by a variance-minimizing heuristic to efficiently select the set of panels and assign/remove dummy density to the set of panels to decrease the effective feature density variation.

US Patent:

7644378, Jan 5, 2010

Filed:

Sep 16, 2004

Appl. No.:

10/943662

Inventors:

Xin Wang - Pasadena CA, US
Charles Chiang - San Jose CA, US

Assignee:

Synopsys, Inc. - Mountain View CA

International Classification:

G06F 17/50
H03K 17/693

US Classification:

716 2, 716 4, 716 17

Abstract:

A characterized cell library for EDA tools includes one or more mathematical models for each cell, and one or more preconditioning functions (and/or inverse preconditioning functions) for each mathematical model. Each mathematical model represents a performance parameter (e. g. , delay, power consumption, noise) or a preconditioned performance parameter of the cell. The preconditioning functions convert an operating parameter (e. g. , input slew, output capacitance) associated with the performance parameter into a preconditioned input variable for the mathematical models. In doing so, the preconditioning functions allow for more accurate modeling of complex data relationships without increasing the complexity (e. g. , order and number of coefficients) of the mathematical models. Also, because the cell library can be substantially similar to conventional polynomial-based cell libraries except for the inclusion of preconditioning functions, preconditioning does not significantly increase storage requirements and conventional EDA tools can be readily adapted to use the preconditioned cell library.

US Patent:

8286121, Oct 9, 2012

Filed:

Nov 20, 2009

Appl. No.:

12/623027

Inventors:

Xin Wang - Pasadena CA, US
Charles C. Chiang - Saratoga CA, US

Assignee:

Synopsys, Inc. - Mountain View CA

International Classification:

G06F 11/22
G06F 17/50
G06F 9/455

US Classification:

716134, 716136

Abstract:

A characterized cell library for EDA tools includes one or more mathematical models for each cell, and one or more preconditioning functions (and/or inverse preconditioning functions) for each mathematical model. Each mathematical model represents a performance parameter (e. g. , delay, power consumption, noise) or a preconditioned performance parameter of the cell. The preconditioning functions convert an operating parameter (e. g. , input slew, output capacitance) associated with the performance parameter into a preconditioned input variable for the mathematical models. In doing so, the preconditioning functions allow for more accurate modeling of complex data relationships without increasing the complexity (e. g. , order and number of coefficients) of the mathematical models. Also, because the cell library can be substantially similar to conventional polynomial-based cell libraries except for the inclusion of preconditioning functions, preconditioning does not significantly increase storage requirements and conventional EDA tools can be readily adapted to use the preconditioned cell library.

US Patent:

8635580, Jan 21, 2014

Filed:

Sep 14, 2012

Appl. No.:

13/619355

Inventors:

Xin Wang - Pasadena CA, US
Charles C. Chiang - Saratoga CA, US

Assignee:

Synopsys, Inc. - Mountain View CA

International Classification:

G06F 9/455
G06F 17/50
G06F 11/22

US Classification:

716136, 716134

Abstract:

A characterized cell library for EDA tools includes one or more mathematical models for each cell, and one or more preconditioning functions (and/or inverse preconditioning functions) for each mathematical model. Each mathematical model represents a performance parameter (e. g. , delay, power consumption, noise) or a preconditioned performance parameter of the cell. The preconditioning functions convert an operating parameter (e. g. , input slew, output capacitance) associated with the performance parameter into a preconditioned input variable for the mathematical models. In doing so, the preconditioning functions allow for more accurate modeling of complex data relationships without increasing the complexity (e. g. , order and number of coefficients) of the mathematical models. Also, because the cell library can be substantially similar to conventional polynomial-based cell libraries except for the inclusion of preconditioning functions, preconditioning does not significantly increase storage requirements and conventional EDA tools can be readily adapted to use the preconditioned cell library.

US Patent:

20050241971, Nov 3, 2005

Filed:

Apr 29, 2004

Appl. No.:

10/837456

Inventors:

Frank Zou - Baldwin Park CA, US
Charles Chiang - Baldwin Park CA, US

International Classification:

A63B053/00
A63B055/00
B65D025/54

US Classification:

206315200, 206769000, 206771000, 229162100

Abstract:

A transport and display case for a golf set. The case has a front panel, a pair of side walls, a rear panel, a top and a bottom. The top is transparent so that it allows maximum amount of light into the case to showcase the golf set within. The front panel has two portions: the upper portion is transparent to allow light into the case and allow consumers to view the golf set, while the lower portion is opaque. Both side walls are opaque. The bottom is locked, but can provide easy access by consumers after they purchase the golf set from store. The case is constructed using a cardboard blank with predefined fold lines and cut-out lines. The cut-lines define portions of the case for attaching the transparent covers such as the lid and upper portion. The case can be “sealed” after the golf set is placed in the case. However, to ensure that the golf set, i.e. the golf bag and golf clubs, is secured during transport from the supplier to the store, the golf clubs are secured to a stabilizer structure through wire ties, prior to the case is “sealed”. The stabilizer, which may be a piece of cardboard, is engaged to the golf bag at its dividers. By securing the clubs to the stabilizer, consumers are not prevented from viewing the club heads from close distance, through the transparent part of the display case.

US Patent:

20090106725, Apr 23, 2009

Filed:

Dec 24, 2008

Appl. No.:

12/343958

Inventors:

Xin Wang - Pasadena CA, US
Charles C. Chiang - San Jose CA, US
Jamil Kawa - Campbell CA, US

Assignee:

SYNOPSYS, INC. - Mountain View CA

International Classification:

G06F 19/00

US Classification:

716 10

Abstract:

One embodiment of the present invention provides a system that computes dummy feature density for a CMP (Chemical-Mechanical Polishing) process. Note that the dummy feature density is used to add dummy features to a layout to reduce the post-CMP topography variation. During operation, the system discretizes a layout of an integrated circuit into a plurality of panels. Next, the system computes a feature density and a slack density for the plurality of panels. The system then computes a dummy feature density for the plurality of panels by, iteratively, (a) calculating an effective feature density for the plurality of panels using the feature density and a function that models the CMP process, (b) calculating a filling amount for a set of panels in the plurality of panels using a target feature density, the effective feature density, and the slack density, and (c) updating the feature density, the slack density, and the dummy feature density for the set of panels using the filling amount. In one embodiment of the present invention, the iterative process is guided by a variance-minimizing heuristic to efficiently select the set of panels and assign/remove dummy density to the set of panels to decrease the effective feature density variation.