Contact sheet
AssigneeNGK Insulators, Ltd.
InventorToshimasa Ochiai
Life of this patent
Estimating the term…
Abstract
A contact sheet used with a socket for connecting an integrated circuit having spherical terminals to a board includes protruding contact springs in some or all of numerous through holes provided in an insulative elastic sheet, wherein each of the contact springs is composed of a conductive material and constituted by two or more cantilevers fixed onto the sheet by bonding at one end thereof. Each cantilever has a lower supporting portion composed of or a planar portion formed adjacently to a portion fixed to the sheet, and a spherical terminal holding portion formed by vertically or aslant bending the other end of the cantilever toward one of two openings of a through hole.
Claims20
A contact sheet used for connecting an electronic device having terminals to a board;
- said contact sheet being unitarily formed from two sheets of insulating elastic material bonded together via an adhesive sheet, each of the two sheets of said contact sheet having a plurality of through-holes and an equal or less number of contact springs on both sides of said adhesive sheet, and said adhesive sheet having through-holes with the same pattern as that of the two insulating sheets of said contact sheet;.
- said contact sheet further comprising:
- protruding contact springs in some or all of said through-holes provided in said contact sheet;
- each of said contact springs comprising a conductive material and being constituted by one or more cantilevers fixed onto said contact sheet by bonding or sandwiching at one end thereof;
- said each cantilever having a lower supporting portion and a terminal portion;
- said lower supporting portion comprising a planar portion formed adjacently to a portion fixed to said contact sheet;
- said terminal portion being formed by vertically or aslant bending the other end of said cantilever toward one of two openings of a through hole;
- and
- when said device is mounted, said terminal portion of each of said cantilevers is pushed and bent in a direction away from the portion of each cantilever that is fixed to the contact sheet, and at the same time, a boundary portion between the terminal portion and the lower supporting portion of at least one cantilever is pressed against said lower supporting portion or a boundary portion between the terminal portion and said lower supporting portion of a cantilever located on the other side of said adhesive sheet.
Dependencies are inferred from the claim text.