Granted Patent B2

US 9,190,350 · App. 14/478,683 · Granted Nov 17, 2015

Abstract

Claims (27)

1. A lead frame for a semiconductor device manufactured by film assisted moulding, the lead frame comprising:

a connection lead, the connection lead comprising

a connection portion for electrical connection to a semiconductor die, having a bond wire portion,

wherein an edge of said connection portion comprises

a recessed portion

wherein the recessed portion is arranged to seal against a film assisted moulding film during moulding of the semiconductor device;

further comprising a mould compound; and

wherein the seal between the recessed portion and the film is configured to block the mould compound from contacting the bond wire portion.

2. The lead frame of claim 1 , wherein the recessed portion is a step portion or a groove portion.

3. The lead frame of claim 1 , wherein said recessed portion is arranged to locally deform said film during manufacture of said semiconductor device.

4. The lead frame of claim 1 further comprising:

a base portion;

wherein the base portion comprises an upper surface arranged for mounting one or more semiconductor device dies,

wherein the connection lead comprises a portion arranged horizontally with respect to the upper surface of the base portion for external connection and an angled tip portion for connection to the semiconductor die, and

wherein the angled portion is arranged to seal against a film during moulding of the semiconductor device.

5. The lead frame of claim 4 , wherein the angled tip portion is arranged to be resiliently biased against the film.

6. The lead frame of claim 5 , angled portion tip subtends a positive angle with respect to the upper surface of the base portion of between 3 and 5 degrees.

7. The lead frame of claim 6 , wherein said positive angle is 4 degrees.

8. The lead frame of claim 1 , wherein the connection lead is a floating lead.

9. The lead frame of claim 8 , wherein said floating lead is physically isolated from a base portion;

wherein the base portion comprises an upper surface arranged for mounting a semiconductor device die.

10. The lead frame of claim 1 , wherein the film is an upper portion of a film used in film assisted moulding.

11. The lead frame of claim 9 , wherein the floating lead substantially overlaps the base portion.

12. The lead frame of claim 1 , wherein the connection portion is arranged to such that following moulding it is substantially horizontal with respect to said base portion.

13. The lead frame of claim 9 , wherein the thickness of said lead is between 0.2 mm and 0.5 mm.

14. The lead frame of claim 1 , wherein the semiconductor device is an RF device.

15. The lead frame of claim 11 , wherein the RF device is an amplifier device.

Assignments (13)