Patent ID: 7132754

Claim:
A flip chip stack ( 16 ) comprising: five integrated circuit chips ( 204 ) arranged linearly as a first chip and a second chip next to said first chip, a third chip next to said second chip, a fourth chip next to said third chip and a fifth chip next to said fourth chip, each chip having a height ( 504 ), that are bonded to one side of a two-sided flexible printed circuit board ( 206 ), said chips oriented a minimum distance ( 404 ) from the next circuit chip; wherein said flip chip stack ( 16 ) having an overall height ( 504 ′), a height ( 504 ″) of a first chip plus the height of a second chip, a height ( 504 ′″) of a first chip plus a second chip plus a third chip, and a height ( 504 ″″) of a fourth chip plus a height of a fifth chip, said distance ( 404 ″) between said first chip and said second chip is k plus the height of the first chip plus the height of the second chip ( 504 ″), said distance ( 404 ′″) between said second chip and said third chip is k plus the height of the first chip, the second chip and the third chip ( 504 ′″), said distance ( 404 ″″) between said third chip and said fourth chip is k plus the overall height ( 504 ′) plus 2 times a distance ( 504 ) between flexible printed circuit board plus 2 times the thickness ( 208 ), and said distance ( 404 ′″″) between said fourth chip and said fifth chip is k plus the height of the fourth chip plus the fifth chip ( 504 ″″), where k is the thickness ( 208 ) multiplied by the quantity 5.5π−10; and said flexible printed circuit board has a thickness ( 208 ) and a minimum bending radius ( 240 ) of about five times the thickness ( 208 ) of the flexible printed circuit board ( 206 ).