Resources Contact Us Home
Lead frame structure

Image Number 2 for United States Patent #4556896.

A novel lead frame structure is provided which contains an integral arrangement of leads for connection to a semiconductor device and a molded housing is then molded around the semiconductor device and the lead frame. The lead elements of the frame are then separated to define a plurality of individual semiconductor devices. The lead frame has an enlarged finger section which receives a semiconductor die. The enlarged lead frame finger has an opening just behind the region which receives the die. This opening as well as all identical openings along the length of the lead strip are then aligned with respective molding gates in one half of a pair of cooperating molding dies so that plastic injected through the gate flows through the opening and upwardly into the mold with the plastic filling the mold cavity from top to bottom while ejecting air from the mold as the mold fills through the clearance opening between the ejector pin and its receiving opening.

  Recently Added Patents
Device for accurately measuring concentration of component in blood and control method of the device
Note tab
Light transformation particle and photobioreactor
Storage device having clock adjustment circuitry with firmware-based predictive correction
Storage system with LU-setting function
Efficient forward ranking in a search engine
Mitigating single point failure of devices in an analyte monitoring system and methods thereof
  Randomly Featured Patents
Method of operating harness making machine
Hematology control composition including leukocyte analogs; and methods for their preparation and use
Vehicle-mounted image processing device, and method for controlling vehicle-mounted image processing device
Optical head including multiple photo detectors for reading signals and error signals for servoing from both a read-only recording medium and a magneto-optical recording medium
Resource contention log navigation with thread view and resource view pivoting via user selections
Fishing spinning reel
Aluminum base fluxless brazing alloy
Mechanism for aligning a waveguide type optical member and fiber arrays
Air cushion vehicle flexible skirts
Three roller design eliminates free span belt heating of integral heating fusing belt