Qualcomm Incorporated

Qualcomm Mems Technologies, Inc.

Waymo LLC

Nao Sugawara Chuei

Kostadin Dimitrov Djordjev

Nai-Kuei Kuo

Ranjith Ranganathan

David William Burns

Koorosh Aflatooni

Ashish Hinger

John Keith Schneider

James C Dunphy

David Neil Hutchison

Manu Parmar

Kwokleung Chan

Eliza Yingzi Du

Hongqin Shi

Stephen Michael Gojevic

Yeh-Jiun Tung

Jack Conway Kitchens, Ii

Jin Gu

Wilhelmus Johannes Robertus Van Lier

Sameer M Venugopal

Ming Yu Chen

Esra Vural

Pramod Kumar Varma

Eric Copenhaver

Jeho Lee

Ramesh K Goel

The present application relates to contact immersion lithography systems and methods of their use. An example immersion lithography system includes a photomask substrate and at least one sensor disposed along a surface of the photomask substrate. The immersion lithography system also includes a controller having at least one processor and a memory. The at least one processor is configured to execute program instructions stored in the memory so as to carry out operations. The operations include receiving, from the at least one sensor, information indicative of an electric field proximate to the at least one sensor. The operations also include determining, based on the received information, at least one of: a thickness of a liquid layer adjacent to the photomask substrate or a distance to a further substrate adjacent to the photomask substrate.

Systems and methods for verifying photomask cleanliness

Systems and methods for multi-spectral ultrasonic imaging are disclosed. In one embodiment, a finger is scanned at a plurality of ultrasonic scan frequencies. Each scan frequency provides an image information set describing a plurality of pixels of the finger including a signal-strength indicating an amount of energy reflected from a surface of a platen on which a finger is provided. For each of the pixels, the pixel output value corresponding to each of the scan frequencies is combined to produce a combined pixel out put value for each pixel. Systems and methods for improving the data capture of multi-spectral ultrasonic imaging are also disclosed.

Multi-spectral ultrasonic imaging

Techniques describe structures and methods for generating larger output signals and improving image quality of ultrasonic sensors by inclusion of an acoustic cavity in the sensor stack. In some embodiments, an ultrasonic sensor unit may be tuned during manufacturing or during a provisioning phase to work with different thicknesses and materials. In some embodiments, a standing wave signal may be generated using an acoustic cavity in the ultrasonic sensor unit for capturing an ultrasonic image of an object placed on a sensor surface. In some implementations, the ultrasonic sensor may include an ultrasonic transmitter, a piezoelectric receiver, a thin film transistor (TFT) layer and a TFT substrate positioned between the transmitter and the receiver, one or more adhesive layers, and optional cover materials and coatings. The thickness, density and speed of sound of the sensor materials and associated adhesive attachment layers may be used to attain the desired acoustic cavity and improved performance.

Ultrasonic imaging with acoustic resonant cavity

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for reducing artifacts in an image generated by a display device. In one aspect, data is written to a display and a position of display elements is maintained based on the application of a bias voltage pattern. The bias voltage pattern includes alternating polarities along one dimension in a pattern having a first frequency spectrum, and alternating polarities along a second dimension in a pattern having a second frequency spectrum that is different than the first frequency spectrum. At least one of the first and second frequency spectrums may include a plurality of frequency components.

Method and device for reducing effect of polarity inversion in driving display

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for calibrating display arrays. In one aspect, a method of calibrating a display array includes determining a particular drive response characteristic and updating a particular drive scheme voltage between updates of image data on the display array.

System and method of updating drive scheme voltages

Growing community of inventors

San Diego, CA, United States of America

Nao Sugawara Chuei