Electronic package with strain relief means
First Claim
1. In an electronic package including a stiffener member, a flexible circuitized substrate secured to said stiffener member and including at least a first dielectric layer, at least one conductive layer located on said first dielectric layer and further including a plurality of signal lines occupying a first plane and each having a projecting lead portion as part thereof which projects a predetermined distance from said first dielectric layer, selected ones of said signal lines adapted for being electrically connected to respective ones of external conductive elements when said elements are positioned on said flexible circuitized substrate, and a semiconductor device including a plurality of contact sites thereon, selected ones of said contact sites electrically coupled to respective ones of said projecting lead portions of said signal lines and spacedly positioned from said stiffener, the improvement wherein said projecting lead portions of said selected ones of said signal lines of said flexible circuitized substrate are bent in a direction substantially toward said semiconductor device and occupy a different plane than said first plane of said signal lines to thereby include strain relief means therein at a location adjacent but not at the point of said electrical coupling between said projecting lead portions and said contact sites of said semiconductor device.
5 Assignments
0 Petitions
Accused Products
Abstract
An electronic package which includes a flexible substrate, stiffener and chip. The chip is bonded to the substrate, which was secured to the stiffener. Strain relief means are utilized at various locations in the package to prevent problems (e.g., tape "wrinkling") associated with relatively large differences in coefficients of thermal expansion between the package'"'"'s various elements.
-
Citations
21 Claims
- 1. In an electronic package including a stiffener member, a flexible circuitized substrate secured to said stiffener member and including at least a first dielectric layer, at least one conductive layer located on said first dielectric layer and further including a plurality of signal lines occupying a first plane and each having a projecting lead portion as part thereof which projects a predetermined distance from said first dielectric layer, selected ones of said signal lines adapted for being electrically connected to respective ones of external conductive elements when said elements are positioned on said flexible circuitized substrate, and a semiconductor device including a plurality of contact sites thereon, selected ones of said contact sites electrically coupled to respective ones of said projecting lead portions of said signal lines and spacedly positioned from said stiffener, the improvement wherein said projecting lead portions of said selected ones of said signal lines of said flexible circuitized substrate are bent in a direction substantially toward said semiconductor device and occupy a different plane than said first plane of said signal lines to thereby include strain relief means therein at a location adjacent but not at the point of said electrical coupling between said projecting lead portions and said contact sites of said semiconductor device.
-
21. An information handling system comprising an electronic package including a stiffener member, a flexible circuitized substrate secured to said stiffener member and including at least a first dielectric layer, at least one conductive layer located on said first dielectric layer and including a plurality of signal lines occupying a first plane and each having a projecting lead portion as part thereof which projects a predetermined distance from said first dielectric layer, selected ones of said signal lines adapted for being electrically connected to respective ones of external conductive elements when said external conductive elements are positioned on said flexible circuitized substrate, and a semiconductor device including a plurality of contact sites thereon, selected ones of said contact sites electrically coupled to respective ones of said projecting lead portions of said signal lines and spacedly positioned from said stiffener, said projecting lead portions of said signal lines of said flexible circuitized substrate being bent in a direction substantially toward said semiconductor device to occupy a different plane than said first plane of said signal lines to thereby include strain relief means therein at a location adjacent but not at the point of said electrical coupling between said projecting lead portions and said contact sites of said semiconductor device.
Specification