Patent ID: 6181977
Filing Date: 2001-01-30
Classification: H01L

Abstract:
A control system to control a technique for attaching substantially rigid stiffener means to a flexible substrate having solder balls, and for controlling the power used in attaching stiffening means to a flexible substrate, said control system comprising:locating a flexible tape, having at least one circuit with a plurality of solder balls, for support by support means having a vacuum chamber;applying a vacuum to said vacuum chamber to hold said flexible tape on said support means;moving punch means having means defining a plurality of recesses matching the location of said solder balls so that a space is defined about said solder balls when said punch means is moved to engage said tape;applying a vacuum to said space about said solder balls so that said flexible tape is supported against said punch means when said vacuum is released on said support means;removing said support means from supporting said flexible tape, and moving a die means into substantially the same location of said support mean;moving said punch means relative to said die means to cut a flexible substrate with said solder balls from said flexible tape;replacing said die means with a stiffener means having a pressure sensitive adhesive;applying a pressure around said solder balls against said flexible substrate in the order of 2000 pounds per square inch to force said flexible substrate and said stiffener means together;a computer readable medium;providing a compliant block support for said stiffening means;holding said flexible substrate stationary while moving said stiffening means to a position against said flexible substrate;first program instruction means for controlling electromechanical means that runs a sequence of steps for setting predetermined process devices in a start condition;second program instruction means for setting a start condition for predetermined ones of said process devices;third program instruction means for controlling timer means to control and to set time intervals for preselected steps in said sequence of steps; andfourth program instruction means for monitoring predetermined ones of said process devices;whereby the functioning of predetermined ones of said process devices is controlled to function in a pre-set manner.