Appeal 2007-1848
Application 10/131,178
The APA acknowledges that pressure sensitive adhesive sheets have
been used to temporarily hold a plurality of adherends to the sheet and upon
application of heat to the entire sheet wherein all of the adherends are
released simultaneously (Specification page 1, line 13 to page 2, line 24).
Tsujimoto teaches the use of a pressure sensitive adhesive sheet for
holding a plurality of adherends and that upon heating the adhesive sheet
loosens its grip upon the adherends thereby releasing them (col. 1, l. 68 to
col. 2, l. 5). Tsujimoto further teaches the use of a heater in the shape of
each individual adherend which is positionable under portions of the
multiple adherend (col. 3, ll. 36-45).
Tsujimoto discloses the adhesive sheet (dicing tape) may comprise
multiple layers including a shrink layer, an adhesive layer, and a non-
shrinkable layer (col. 5, ll. 38-50; fig. 4). Figure 5 depicts be dicing tape
that has been partially cut to the surface of the non-shrinkable film. Figure 6
depicts the shrinking of the dicing tape, including the deformation of the
adhesive layer, after the application of heat and the shrinking (col. 6, ll.
30-38). It is recognized that the figure 6 shows the non-shrinkable layer has
not been distorted due to the application of heat.
Tsujimoto discloses the separate heating of only the portion of the
dicing tape. In this embodiment the adherends can be removed one at a time
without loosening the remaining adherends (col. 7, l. 59 to col. 8, l. 7; fig. 8).
Lu describes a method of removing a plurality of adherends on a
pressure sensitive adhesive sheet wherein an adhered layer and the adhesive
layer, but not the base material of the adhesive sheet are cut to form
individual adherends. Lu employs UV light to react with the adhesive for
removal of the adherends. Lu teaches that the adhesive layer is cut either
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Last modified: September 9, 2013