Integrated defibrillation pulse protector

US9948091B1 · kind B1 · utility

Assignee

• Maxim Integrated Products, Inc. · US

Inventors

• Douglas S. Smith · Rochester, US
• Vladislav Vashchenko · Palo Alto, US
• Augusto Tazzoli · San Jose, US
• Sudhir Mulpuru · Milpitas, US
• Lawrence R. Skrenes · Hartland, US

Key dates

• Filing date: May 31, 2016
• Grant date: Apr 17, 2018
• Expiry date: May 31, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/3904
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Silicon-controlled rectifier (SCR) based circuit for ECG protection under defibrillator pulse is disclosed. The SCR-based clamp is a symmetric structure for dual-direction voltage tolerance protection based on two anti-series P-well/N-well lateral blocking junctions isolated from P-substrate by the N-buried layer. The injector regions (n+/p+) are substantially lengthened in order to accommodate a larger number of contact rows than typically used for ESD pulses specification. A stack of metal layers may also be used to provide high current and heat-sink capability with each electrode metal layer fully filled with VIAs.