Patent ID: 11908931
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A monolithic metal-insulator transition device comprising:
a lower electrode;
a substrate provided on the lower electrode, having a first impurity, a driving region and a switching region in contact with the driving region;
a channel well region provided within the substrate in the driving region and having a second impurity;
a gate electrode on a center of the channel well region;
a first source/drain region provided on one side of the channel well region and having the first impurity;
a second source/drain region provided on another side of the channel well region, having the first impurity, and being deeper than the first source/drain region;
a control well region provided within the substrate in the switching region and having a depth different from that of the second impurity and the channel well region;
an inlet well region provided within the center of the control well region;
an inlet contact area provided within a center of the inlet well region and having a first depth;
a control contact area within an edge of the control well area outside both sides of the inlet well region;
a first contact provided on the first source/drain region;
a second contact provided on the second source/drain region;
a gate contact provided on the gate electrode;
an inlet contact provided on the inlet contact area;
a control contact provided on the control contact area;
a first line connecting the first contact to the control contact;
a second line connecting the second contact to the inlet contact; and
a third line connected to the gate contact,
wherein the first source/drain region comprises:
a first lower concentration impurity region having the first impurity, the first depth, a first width, and a first edge aligned with one edge of the gate electrode; and
a first higher concentration impurity region provided in the first lower concentration impurity region and having the first depth and a second width narrower than the first width, the first higher concentration impurity region being disposed at a first distance from the first edge, and having a concentration higher than that of the first impurity of the first lower concentration impurity region,
wherein the second source/drain region comprises:
a second lower concentration impurity region having a second depth deeper than the first depth, a second width wider than the first width, and a second edge partially overlapping another edge of the gate electrode; and
a second higher concentration impurity region provided in the second lower concentration impurity region and disposed at a second distance longer than the first distance from the second edge, the second higher concentration impurity region having the first depth, the second width, and a concentration higher than that of the second lower concentration impurity region of the first impurity.