OPTICAL CIRCUIT BOARD AND ELECTRONIC COMPONENT MOUNTING STRUCTURE USING SAME
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United States of America Patent
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Issued Date -
Aug 25, 2022
app pub date -
May 12, 2020
filing date -
Jul 25, 2019
priority date (Note) -
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Abstract
An optical circuit board includes a wiring board and an optical waveguide located on a surface of the wiring board. The optical waveguide includes a lower cladding layer, a core, and an upper cladding layer disposed in this order from the wiring board. The lower cladding layer includes a first region including an opening portion, and a second region in which the core and the upper cladding layer are disposed in this order, the second region being adjacent to the first region. The core includes an exposed portion having the upper cladding layer not disposed in the first region. Furthermore, at least one supporting member is disposed in a circumference edge portion of the opening portion, in the first region of the lower cladding layer, and a difference between a height of the supporting member and a height of the exposed portion in the core is 5% or less.
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