Self-triggering SCR device

The self-triggering SCR device comprises a P substrate, and a first P + injection region, a first grid electrode, a second P + injection region, a first groove, a first N + injection region, a second grid electrode, a second N + injection region, a second groove and a third P + injection region are sequentially arranged on the upper surface of the P substrate; an N well is arranged under the first P + injection region, the first grid electrode, the second P + injection region, the first groove and part of the first N + injection region; meanwhile, a P well is arranged below the other part of the first N + injection region, the second grid electrode, the second N + injection region, the second groove and the third P + injection region. According to the SCR device disclosed by the invention, through structural improvement and overall optimization, the SCR device has a smaller area. 本发明公开了一种自触发的SCR器件，包括P衬底，在P衬底上表面依序分别设置有第一P+注入区、第一栅极、第二P+注入区、第一沟槽、第一N+注入区、第二栅极、第二N+注入区、第二沟槽、第三P+注入区；并且在第一P+注入区、第一栅极、第二P+注入区、第一沟槽和部分第一