公开(公告)号：US20140339601A1

公开(公告)日：2014-11-20

申请号：US13896123

申请日：2013-05-16

Applicant: Analog Devices Technology

Inventor： Javier Alejandro Salcedo ,  David J. Clarke ,  Jonathan Glen Pfeifer

IPC: H01L27/02

CPC classification number: H01L27/0262 ,  H01L21/761 ,  H01L27/027 ,  H01L27/0817 ,  H01L29/1083 ,  H01L29/1087 ,  H01L29/66121 ,  H01L29/7436 ,  H01L29/87

Abstract: Dual-tub junction-isolated voltage clamp devices and methods of forming the same are provided herein. The voltage clamp device can provide junction-isolated protection to low voltage circuitry connected between first and second high voltage interface pins. In certain implementations, a voltage clamp device includes a PNPN protection structure disposed in a p-well, a PN diode protection structure disposed in an n-well positioned adjacent the p-well, a p-type tub surrounding the p-well and the n-well, and an n-type tub surrounding the p-type tub. The p-type tub and the n-type tub provide junction isolation, the p-type tub can be electrically floating, and the n-type tub can be electrically connected to the second pin. The first and second pins can operate at a voltage difference below the junction isolation breakdown, and the second pin can operate with higher voltage than the first pin.

Abstract translation: 双槽结隔离电压钳装置及其形成方法在此提供。 电压钳位器件可以为连接在第一和第二高压接口引脚之间的低压电路提供结隔离保护。 在某些实施方式中，电压钳位装置包括设置在p阱中的PNPN保护结构，PN二极管保护结构，其布置在邻近p阱的n阱中，围绕p阱的p型阱和 n型井和围绕p型桶的n型桶。 p型桶和n型桶提供结隔离，p型桶可以电浮动，并且n型桶可以电连接到第二销。 第一和第二引脚可以在低于结隔离击穿的电压差下工作，而第二引脚可以以比第一引脚更高的电压工作。