Multilayer optical fiber sheet, optical fiber sheet fabricating method, and optical fiber sheet
In order to avoid a frequent multiple crossing in an optical fiber in a sheet and attach the optical connector near a marginal end of the sheet while maintaining a sufficient extra length and more extra length for attaching the optical fibers, in the optical fiber sheet 6 , an optical fiber 5 as an extra length section in the optical fiber path is disposed on three-layer wiring planes which are formed by attaching four sheets 1, 2, 3 , and 4 . Notched sections 2 a and 3 a are formed in the intermediate layers 2 and 3 . The optical fiber 5 communicates from a first wiring layer to a second wiring layer via the notched section 2 a so as to communicate from the second wiring layer to a third wiring layer via the notched section 3 a.
1. A method for manufacturing an optical fiber sheet comprising the steps for:
disposing optical fibers on a first sheet by a desirable pattern;
applying a second sheet on the first sheet so as to have an interlayer communicating section therebetween;
attaching an optical connector on a tip of an optical fiber which is drawn out of the sheets;
disposing the optical fiber to which the optical connector is attached on the second sheet via the interlayer communicating section; and
applying a third sheet on the second sheet.
2. A method for manufacturing an optical fiber sheet according to claim 1 further comprising the steps for:
disposing an optical fiber tentatively on the second sheet such that a predetermined length of the optical fiber should be drawn out of an end margin of the sheet;
removing the optical fiber which is tentatively disposed on the second sheet;
attaching an optical connector on a tip of the removed optical fiber;
disposing the optical fiber on the second sheet again; and
applying the third sheet to the second sheet.
3. A method for manufacturing an optical fiber sheet according to claims 1 or 2 wherein the optical fiber is drawn out to the interlayer communicating section.
4. A method for manufacturing an optical fiber sheet comprising the steps for:
disposing optical fibers on a first sheet by a desirable pattern;
applying a second sheet, which is provided with a notched section in a region to which the optical fiber is drawn, on the first sheet;
disposing an optical fiber tentatively which expands from the notched section on the second sheet such that a predetermined length of the optical fiber should be drawn out of an end margin of the sheet;
removing the optical fiber which is tentatively disposed on the second sheet;
disposing the optical fiber on the second sheet again so as to have a predetermined extra length of optical fiber after disposing the optical fiber; and
applying the third sheet to the second sheet.