Pre-molded lead frame and process for manufacturing the same
OwnerSay Teow CHAN, Yue Gen YU +3inventors
InventorsSay Teow CHAN, Yue Gen YU, Hong GU, Dawei XING, Yun ZHAO
Life of this patent
Estimating the term…
Abstract
A lead frame and a method of manufacturing said lead frame is provided wherein a base material with first and second planar sides is first selectively etched from the first side thereof to a predetermined etching level to create etched areas. The etched areas on the first side of the said base material are then filled with a filling compound and thereafter, the base material is etched from the second side to the etching level to expose the filling compound on the second side.
Claims20
Method of manufacturing a lead frame, comprising the steps of:
- providing a base material with first and second planar sides;
- selectively etching the base material from the first side thereof to a predetermined etching level to create etched areas;
- filling the etched areas on the first side of the said base material with a filling compound;
- and thereafter
- etching the base material from the second side to the etching level to expose the filling compound on the second side.
A lead frame comprising:
- a base material having substantially planar first and second sides, the base material further defining at least one die pad and a plurality of leads separated by etched areas of the base material;
- and
- a filling compound formed at the etched areas of the base material for interlocking the die pad and the leads;
- wherein the filling compound is formed such that it is substantially flush with said first and second planar sides of the base material.
A lead frame comprising:
- a base material having substantially planar first and second sides, the base material further defining at least one die pad and a plurality of leads separated by etched areas of the base material;
- a filling compound formed at the etched areas of the base material for interlocking the die pad and the leads;
- and
- locking features in the form of indentations located along peripheral edges of the etched areas that are operative to lock the filling compound to the base material.
Dependencies are inferred from the claim text.