IC chip package having force-adjustable member between stiffener and printed circuit board
AssigneeInternational Business Machines Corporation
InventorsLewis S. Goldmann, Jeffrey A. Zitz
Life of this patent
Estimating the term…
Abstract
An IC chip package and related method are disclosed. The IC chip package may include a printed circuit board (PCB) coupled to a chip carrier by a land grid array (LGA) connector; a metal stiffener including at least one force-adjustable member contacting an underside of the PCB; and at least two couplers for coupling the metal stiffener to a lid or a heat sink, with the PCB, the chip carrier and the LGA connector therebetween. The force-adjustable member reduces the required assembly forces and accommodates natural and non-systematic out-of flatness tolerances of the PCB and the chip carrier.
Claims12
A chip package comprising:
- a printed circuit board (PCB) coupled to a chip carrier by a land grid array (LGA) connector;
- a metal stiffener including at least one force-adjustable member contacting an underside of the PCB, wherein the at least one force-adjustable member includes an adjustment screw that presses against the at least one force-adjustable member;
- and
- at least two couplers for coupling the metal stiffener to a lid or a heat sink, with the PCB, the chip carrier and the LGA connector therebetween.
A method packaging an integrated circuit (IC) chip, the method comprising:
- providing a printed circuit board (PCB) coupled to a chip carrier by a land grid array (LGA) connector, the chip carrier holding the IC chip;
- coupling a lid or a heat sink to a metal stiffener with the PCB, the chip carrier and the LGA connector therebetween, the metal stiffener including at least one force-adjustable member contacting an underside of the PCB, wherein the at least one force-adjustable member includes an adjustment screw that presses against the at least one force-adjustable member;
- and
- adjusting a spring force applied to at least one of the PCB, the LGA connector and the chip carrier by adjusting a force applied by the force-adjustable member.
Dependencies are inferred from the claim text.