Patent ID: 7606048

Claim:
A circuit module comprising: a base element CSP integrated circuit comprising a first and second set of contacts; a support dement CSP integrated circuit comprising a first and a second set of contacts and; a flex circuit having a first end portion disposed substantially in a plane underneath the base element CSP integrated circuit and a second end portion disposed substantially in a plane above the base element CSP integrated circuit but below the support element CSP, the flex circuit further having at least a first and second conductive layers, the first conductive layer providing an electrical connection between the first set of contacts of the base element CSP integrated circuit and the first set of contacts of the support element CSP integrated circuit and the second conductive layer providing an electrical connection between the second set of contacts of the support element CSP integrated circuit and the second set of contacts of the base element CSP integrated circuit; the first conductive layer is disposed at a first conductive layer level of the flex circuit and the second conductive layer is disposed at a second conductive layer level of the flex circuit and a via transits between the first and second conductive layer levels.