Membrane probing system
View Patent ↗A substrate, preferably constructed of a ductile material and a tool having the desired shape of the resulting device for contacting contact pads on a test device is brought into contact with the substrate. The tool is preferably constructed of a material that is harder than the substrate so that a depression can be readily made therein. A dielectric (insulative) layer, that is preferably patterned, is supported by the substrate. A conductive material is located within the depressions and then preferably lapped to remove excess from the top surface of the dielectric layer and to provide a flat overall surface. A trace is patterned on the dielectric layer and the conductive material. A polyimide layer is then preferably patterned over the entire surface. The substrate is then removed by any suitable process.
1. A probing device for probing an electrical device supported by a support, said probing device comprising:
(a) a membrane defining a surface;
(b) a plurality of conductive traces supported by said membrane;
(c) a plurality of contacts supported by said membrane, each of said contacts connected to at least one of said conductive traces, each said contact having at least one substantially flat surface inclined at an acute angle relative to an axis perpendicular to said surface, and wherein each of said contacts tilts when said electrical device is probed by said probing device.
2. The probing device of claim 1 where said contact has a tail and a contacting portion, and said inclined surface is a side of said contact.
3. The probing device of claim 1 wherein said inclined surface is a side of said contact.
4. The probing device of claim 1 wherein said contact is integral.
5. The probing device of claim 1 wherein said contact is substantially pyramidal.
6. The probing device of claim 1 wherein said contact defines a footprint having a wide end and a narrow end.
7. The probing device of claim 5 wherein each of said contacts has a respective contacting portion, said contacting portion s are aligned in linear arrangement, and said contacts are arranged so that a wide end of one of said contacts is adjacent to a narrow end of another of said contacts.
8. The probing device of claim 1 wherein each of said contacts has a respective contacting portion, and said contacting portions are aligned in linear arrangement.