Patent ID: 9676606
Date: 2017-06-13
CPC Classifications: B81B,B81C

Claim:
1. A microelectromechanical systems (MEMS) structure comprising: a carrier substrate defining a lower surface of a cavity and a sidewall of the cavity, wherein the carrier substrate includes a first anti-stiction bump and a second anti-stiction bump arranged along the lower surface; an oxide layer lining an upper surface of the carrier substrate and sidewalls of the cavity, wherein the oxide layer comprises a U-shaped profile that covers and contacts the second anti-stiction bump, wherein the U-shaped profile comprises a barrier region of the oxide layer and a sidewall region of the oxide layer, wherein the barrier region covers and contacts the second anti-stiction bump, and wherein the sidewall region contacts the sidewall of the cavity and the lower surface of the cavity at a location laterally spaced from the barrier region by a gap; and a MEMS device arranged over the carrier substrate and bonded to the carrier substrate through the oxide layer, wherein the MEMS device includes a movable mass suspended in the cavity over the first anti-stiction bump and laterally offset from the second anti-stiction bump, and wherein the movable mass is laterally spaced from the U-shaped profile.