Integrated optical filter

US7880253B2 · kind B2 · utility

Assignee

• STMicroelectronics SA

Inventors

• Francois Roy · Seyssinet-Pariset, FR
• Tarek Lule · Saint-Égrève, FR
• Samir Guerroudj · Saint-Étienne, FR

Key dates

• Filing date: Jun 13, 2008
• Grant date: Feb 1, 2011
• Expiry date: Jan 6, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F39/8053

Abstract

The disclosure relates to an integrated circuit comprising at least one photosensitive cell. The cell includes a photosensitive element, an input face associated with the said photosensitive element, an optical filter situated in at least one optical path leading to the photosensitive element and an interconnection part situated between the photosensitive element and the input face. The optical filter is disposed between the photosensitive element and the surface of the interconnection part closest to the input face. In particular, the optical filter can be disposed within the interconnection part. The disclosure also proposes that the filter be formed using a glass comprising cerium sulphide or at least one metal oxide.