Invention Grant
US07256112B2 Laser activation of implanted contact plug for memory bitline fabrication
有权
用于存储器位线制造的植入接触插塞的激光激活
- Patent Title: Laser activation of implanted contact plug for memory bitline fabrication
- Patent Title (中): 用于存储器位线制造的植入接触插塞的激光激活
-
Application No.: US11039429Application Date: 2005-01-20
-
Publication No.: US07256112B2Publication Date: 2007-08-14
- Inventor: Yung Fu Chong , Dong Kyun Sohn , Liang Choo Hsia
- Applicant: Yung Fu Chong , Dong Kyun Sohn , Liang Choo Hsia
- Applicant Address: SG Singapore
- Assignee: Chartered Semiconductor Manufacturing, Ltd
- Current Assignee: Chartered Semiconductor Manufacturing, Ltd
- Current Assignee Address: SG Singapore
- Agent William J. Stoffel
- Main IPC: H01L21/42
- IPC: H01L21/42

Abstract:
An example method of forming a bitline contact region and bitline contact plug for a memory device using a laser irradiation activation process. An example embodiment comprises: providing a substrate having a logic region and a SONOS memory region. We form in the memory region, a memory transistor comprised of a memory gate dielectric, a memory gate electrode, memory LDD regions, memory spacers on the sidewalls of the memory gate electrode. We then perform a “memory Cell Source Line” implant to form a memory source line in the memory region adjacent to the memory gate electrode. We form silicide over the memory gate electrode and on the memory source line. We form an ILD dielectric layer over the substrate surface. We form a contact opening in the ILD dielectric layer over the memory Drain in the memory area. We etch an opening in the substrate in the drain region adjacent to the memory gate electrode. The opening exposes the memory cell first well and exposes the memory drain on the sidewall of the opening. We perform a bitline contact plug implant to from a doped contact region under the opening. We activate the doped contact region to form an activated doped contact region using a laser irradiation process. The laser irradiation process improves the electrical activation of the doped contact region without interfering with the silicide and S/D regions of the logic devices.
Public/Granted literature
- US20060160343A1 Laser activation of implanted contact plug for memory bitline fabrication Public/Granted day:2006-07-20
Information query
IPC分类: