Patent ID: 6525945
Filing Date: 2003-02-25
Classification: H05K

Abstract:
An electronic package (200) comprising:a printed circuit board (224); an integrated circuit (210) operating over a frequency range Flow to Fhigh; a carrier component (216) to electrically connect the printed circuit board (224) to the integrated circuit. (210) through a plurality of solder balls (218), the plurality of solder balls comprising at least one ground voltage solder ball and at least one power voltage solder ball; and a plurality of decoupling capacitors (226) mounted on the printed circuit board and electrically connected to the at least one ground voltage solder ball and to the at least one power voltage solder ball wherein the plurality of decoupling capacitors (226) range from a lower capacitor value Clow to a higher capacitor value Chigh such that the range Clow to Chigh of the capacitor values is a function of the frequency range Flow to Fhigh of the integrated circuit (210), wherein the lower capacitor value is equal to CLow=14&it;Ï€â€ƒ2&it;LpFhigh2,â€ƒwherein Lp is the parasitic inductance of said lower capacitor; and wherein the higher capacitor value is equal to Chigh=14&it;Ï€â€ƒ2&it;LpFlow2,â€ƒwherein Lp is the parasitic inductance of said higher capacitor.