Resources Contact Us Home
Lead frame structure

Image Number 5 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
Extract of Vanilla planifolia
Stroboscopic image modulation to reduce the visual blur of an object being viewed by an observer experiencing vibration
System and method for configuring software applications in a motor vehicle
Image decolorizing device
Paper product with surface pattern
Method and arrangement for controlling semiconductor component
Method of controlling an indentation depth of an electrode into a metal substrate during welding
  Randomly Featured Patents
Light emitting element, image sensor and light receiving element with linearly varying waveguide index
System and method for assisting generation of business specification
Thermoplastic resin composition for light reflector, formed article for light reflector, light reflector, and method for producing formed article for light reflector
pH test elements
Current reference circuit with voltage offset circuitry
Substituted chromone-3-carbonitriles, carboxamides and carboxylic acids useful for preventing asthmatic symptoms
Physical quantity detection circuit and physical quantity sensor device
Conveyance apparatus for processing step
Device for detecting material stresses in mouldings and castings
Methods for determining the orientation of a tissue graft