The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 1991
Filed:
Nov. 15, 1990
John J DeAndrea, Monmouth Junction, NJ (US);
AMP Incorporated, Harrisburg, PA (US);
Abstract
A device for providing an optical feedback path for a receiver comprises a header including a base having a major surface and first, second and third leads. The first and second leads extend through the base to form first and second posts on the major surface of the base and the third lead is electrically connected to the base. The portion of the first and second leads extending through the base are surrounded by electrical insulation so that the first and second leads are electrically insulated from the base. A submount comprising a flat insulating block with a layer of gold on its top and bottom surfaces is solder-bonded to the major surface of the base and the gold layer on the top surface of the submount is wire-bonded to the base. An LED is solder-bonded to the top surface of the submount and wire-bonded to the first post on the major surface of the base, the LED emitting optical radiation when it is forward biased. A P-I-N diode is also solder-bonded to the top surface submount and wire-bonded to the second post on the major surface of the base of the header. The P-I-N diode detects the optical radiation emitted by the LED. In order to insure that the light emitted by the LED is detected by the P-I-N diode as is required to establish a feedback path for a receiver, the standard header cover with a glass window is utilized. However, to form an optically reflecting surface, the interior surface of the glass window is illustratively metallized by platinum sputtering followed by gold plating.