Flex circuit shielded optical sensor

US6985764B2 · kind B2 · utility

Assignee

• Masimo Corporation · US

Inventors

• Gene Mason · La Mirada, US
• Ammar Al-Ali · San Juan Capistrano, US
• Thomas J. Gerhardt · Berlin, DE

Key dates

• Filing date: May 2, 2002
• Grant date: Jan 10, 2006
• Expiry date: Jan 8, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49155
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A flex circuit optical sensor has an integrated Faraday shield. A conductive trace layer disposed on a substrate is used to form a conductive grid which shields the face of a photodetector. A conductive ink layer is formed on a substrate side opposite the trace layer. The back and sides of the detector are shielded by flex circuit flaps that have the conductive ink layer but substantially exclude the trace layer so as to fold over and closely adhere to the detector body. The shielded substrate flaps advantageously eliminate a separate detector shield, which is typically fabricated with an etched copper part that must be attached to a flex circuit before mounting the detector.