Method and apparatus for mounting a component to a substrate using an anisotropic adhesive, a compressive cover film, and a conveyor
First Claim
1. A method for mounting a component to a substrate comprising:
- placing the component on the substrate with an anisotropic adhesive therebetween;
moving the component and substrate on a conveyor through a chamber;
drawing a cover film moving at a same speed as the conveyor over the component and substrate to compress the anisotropic adhesive;
curing the anisotropic adhesive while under compression; and
withdrawing the cover film from the component and substrate.
4 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for mounting a component, such as a semiconductor die, to a substrate are provided. A z-axis anisotropic adhesive is applied to the substrate and the component is placed on the anisotropic adhesive. During a curing process a cover film is drawn over the component and substrate to maintain the anisotropic adhesive in compression. A conveyorized curing apparatus includes a conveyor belt for moving the substrate through a heated process chamber. The cover film is mounted on an endless belt and is adapted to move at a same speed as the conveyor belt. As the die and substrate are moved through the process chamber, a vacuum plenum draws the cover film over the die and substrate to exert a uniform force on the component.
37 Citations
23 Claims
-
1. A method for mounting a component to a substrate comprising:
-
placing the component on the substrate with an anisotropic adhesive therebetween; moving the component and substrate on a conveyor through a chamber; drawing a cover film moving at a same speed as the conveyor over the component and substrate to compress the anisotropic adhesive; curing the anisotropic adhesive while under compression; and withdrawing the cover film from the component and substrate. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for mounting a semiconductor die to a substrate comprising:
-
applying a z-axis anisotropic adhesive to the substrate or to the die; placing the die on the substrate; moving the die and substrate on a conveyor belt through a chamber while drawing a cover film moving at a same speed as the conveyor over the die and substrate to exert a force on the die and compress the anisotropic adhesive between the die and substrate; curing the anisotropic adhesive while under compression; and withdrawing the cover film from the die and substrate. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method for flip chip mounting a semiconductor die to a substrate comprising:
-
providing the substrate with a contact pad; applying a z-axis anisotropic adhesive to the contact pad; placing the die on the anisotropic adhesive; placing the die and substrate on a conveyor belt adapted to move through a heated process chamber; drawing a cover film over the die and substrate using a vacuum directed through the conveyor belt, said cover film adapted to apply a force to the die and compress the anisotropic adhesive for establishing an electrical connection between a contact location on the die and the contact pad on the substrate; curing the anisotropic adhesive while under compression; and withdrawing the cover film from the die and substrate. - View Dependent Claims (17, 18, 19)
-
-
20. An apparatus for curing an anisotropic adhesive placed between a component and substrate, said apparatus comprising:
-
a process chamber; a heat source for heating the process chamber; a conveyor for moving the substrate through the process chamber; an endless belt of cover film configured to move through the process chamber at a same speed as the substrate and die; and a vacuum plenum in fluid communication with a vacuum source, said vacuum plenum adapted to draw the cover film over the substrate and component to exert a force on the component and compress the anisotropic adhesive during curing. - View Dependent Claims (21, 22, 23)
-
Specification