Patent · US Active

Inspection of bonding quality of transparent materials using optical coherence tomography

US11499814B2 · kind B2 · utility

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25Claims

0Family size

Assignees

Carl Zeiss AG · DE
Carl Zeiss Industrial Metrology, LLC · US
Carl Zeiss Meditec AG · DE

Inventors

Michael Totzeck · Schwäbisch Gmünd, DE
Marcin B. Bauza · Charlotte, US
Jochen Straub · Erlangen, DE
Muzammil Arain · Milpitas, US
Matthew J. Everett · Livermore, US

Key dates

Filing date	Jun 12, 2019
Grant date	Nov 15, 2022
Priority date	—
Expiry date	Jun 12, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/8438
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An optical coherence tomography (OCT) system (63) is used to inspect bonding points (66A, 66B, 66C) sandwiched between two materials (layers 62, 64 of e.g. displays). The OCT differentiates between a bonding point, e.g. a weld, and air gaps between the two materials. The bonding points are identified as breaks in the air gap between the materials. By extracting various physical characteristics of the bonding points and the gap between the two materials, the present system determines whether the bonding is faulty.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.