Method for gluing optical disc substrates together
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United States of America Patent
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Aug 27, 2002
Grant Date -
N/A
app pub date -
Oct 10, 2000
filing date -
Feb 24, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for gluing two disc elements together, in particular substrates for digital audio, video or data discs, such as Digital Versatile Discs (DVDs). The disc elements are held essentially horizontally and coaxially with one another so that a gap is formed between the disc elements, after which, in an inner area of the gap, a liquid adhesive is applied in the form of separate strands in the circumferential direction on the facing sides of the disc elements. The disc elements are brought together against one another and made to rotate rapidly in conjunction with the bringing together in order, by the gravitational force of the upper disc element and the capillary force of the adhesive, in association with the centrifugal force on the latter during the rapid rotation, to form a homogeneous and bubble-free adhesive layer of predetermined thickness between the disc elements.
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