Distributed reverse surge guard

US6717229B2 · kind B2 · utility

Assignee

• FabTech, Inc. · US

Inventors

• Walter Riley Buchanan · Olathe, US
• Roman Hamerski · Olathe, US
• Wayne A. Smith · Holland Patent, US

Key dates

• Filing date: Mar 11, 2002
• Grant date: Apr 6, 2004
• Expiry date: Apr 25, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10D8/60

Abstract

A diode (20), having first and second conductive layers (24,26), a conductive pad (28), and a distributed reverse surge guard (22), provides increased protection from reverse current surges. The surge guard (22) includes an outer loop (42) of P+-type surge guard material and an inner grid (44) of linear sections (46, 48) which form a plurality of inner loops extending inside the outer loop (42). The surge guard (22) distributes any reverse current over the area of the conductive pad (28) to provide increased protection from transient threats such as electrostatic discharge (ESD) and during electrical testing.