Invention Grant
- Patent Title: Leadless package with internally extended package leads
- Patent Title (中): 无引线封装,内部扩展封装引线
-
Application No.: US12191188Application Date: 2008-08-13
-
Publication No.: US08174099B2Publication Date: 2012-05-08
- Inventor: Ken Lam
- Applicant: Ken Lam
- Applicant Address: US CA San Jose
- Assignee: Atmel Corporation
- Current Assignee: Atmel Corporation
- Current Assignee Address: US CA San Jose
- Agency: Fish & Richardson P.C.
- Main IPC: H01L23/495
- IPC: H01L23/495 ; H01L23/535

Abstract:
A DFN package includes internally extended package leads. One or more package pads are physically and electrically extended from a first edge of the package to a second, opposite edge of the package. These extended package leads can terminate at the edges of the leadframe. The package pads and the extended package leads where the IC die is attached can have full leadframe thickness. Other extended package lead features can have a reduced leadframe thickness (e.g., about half the leadframe thickness). Leadframe features can be physically and electrically connected to a tie-bar feature which can be an integral part of a leadframe matrix. The tie-bar can stabilize the leadframe features during assembly. The tie-bar can also provide electrical connectivity for post assembly leadframe plating. The tie-bar can be removed during package singulation by sawing or punching techniques to free the leadframe features both physically and electrically.
Public/Granted literature
- US20100038759A1 Leadless Package with Internally Extended Package Leads Public/Granted day:2010-02-18
Information query
IPC分类: