Lead frame including suspending leads having trenches formed...

Active solid-state devices (e.g. – transistors – solid-state diode – Housing or package – With contact or lead

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07732910

ABSTRACT:
In a lead frame, through holes are formed outside suspending leads and trenches are formed on a back surface along the suspending leads so as to communicate with the through holes. When sealing resin is injected into cavities of a resin molding die, air enters the through holes through air vents and flows out from the through holes by a resin injection pressure in the trenches, making it easier for the sealing resin to enter the through holes. Since the sealing resin leaking to the air vents can be injected into the through holes, it is possible to enhance the bonding force between the sealing resin after curing and the lead frame in the vicinity of the air vents and effect release of the resin molding die, while allowing the sealing resin leaking to the air vents to remain on the lead frame side without remaining within the air vents.

REFERENCES:
patent: 5665651 (1997-09-01), Asada et al.
patent: 6563209 (2003-05-01), Takahashi
patent: 7112471 (2006-09-01), Boon et al.
patent: 2001/0022396 (2001-09-01), Distefano et al.
patent: 2001/0032985 (2001-10-01), Bhat et al.
patent: 2002/0001869 (2002-01-01), Fjelstad
patent: 2002/0123163 (2002-09-01), Fujii
patent: 2002/0173076 (2002-11-01), Michii et al.
patent: 2003/0209815 (2003-11-01), Ito et al.
patent: 2005/0284578 (2005-12-01), Uchida et al.
patent: 2005-151625 (2002-05-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Lead frame including suspending leads having trenches formed... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lead frame including suspending leads having trenches formed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lead frame including suspending leads having trenches formed... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4208556

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.