US 6,129,040 AGranted

Semi-conductor mounting apparatus for applying adhesive to a substrate

AssigneeEsec AG

InventorsFranco Viggiano, Christof Koster

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Abstract

An apparatus for applying an adhesive pattern to a chip mounting surface by means of an adhesive dispensing head movable in z, y, and z dimensions, contains a first carriage, which is movable in x and y dimensions using first and second actuators. A second carriage with a dispensing head is movable in the z dimension, perpendicular to the chip mounting surface, on a guide mounted on the first carriage. A third actuator is provided with a positioning motor mounted in a stationary manner and an auxiliary carriage displaceable in the z direction. The auxiliary carriage, driven by the positioning motor, runs in a stationary guide. The auxiliary carriage has a positioning surface parallel to the chip mounting surface and a stop, the stop kept in constant contact with the positioning surface. Preferably, this contact is a gliding contact retained by a spring. The apparatus has good dynamic properties which make possible a rapid "drawing" of adhesive patterns with a high degree of precision.

Claims8

Dependent claims

A semiconductor mounting apparatus for applying adhesive to a chip mounting surface on a substrate, including:

an adhesive dispensing head;
a first actuator;
a second actuator;
a third actuator;
a first carriage movable in a first dimension parallel to the chip mounting surface using said first actuator and movable in a second dimension parallel to the chip mounting surface using said second actuator;
a guide, said guide connected to said first carriage and running in a third dimension perpendicular to said chip mounting surface;
a second carriage connected to said guide and moveable along said guide in the third dimension using said third actuator, said second carriage carrying said adhesive dispensing head;
said third actuator having a positioning motor mounted in a stationary manner and an auxiliary carriage driven by said motor, said auxiliary carriage attached to a stationary guide and moveable along said stationary guide in the third dimension, said auxiliary carriage further having a positioning surface parallel to said chip mounting surface;
and
said second carriage having a stop, wherein said stop cooperates with said positioning surface of said auxiliary carriage and which is kept in constant contact with said positioning surface of said auxiliary carriage.

7 more elements

Dependencies are inferred from the claim text.