Hearing assistance coplanar waveguide
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United States of America Patent
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Oct 4, 2016
Grant Date -
Apr 9, 2015
app pub date -
Oct 9, 2013
filing date -
Oct 9, 2013
priority date (Note) -
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Abstract
Disclosed herein, among other things, are methods and apparatuses that provide a manufacturable RF transmission line to go through the bend area of a flexible circuit to be used in a compact design, such as in a compact hearing aid design. One aspect of the present subject matter relates to using multiple inner layers of the flexible circuit to route RF transmission. By not using outer layers, the RF transmission line will be less susceptible to delamination from the polyimide dielectric layer. One aspect of the present subject matter relates to choosing copper transmission line to have dimensions that allow for narrower transmission lines with good RF return loss. The copper transmission line dimensions also allow for manufacturing in a standard process without adding extra cost.
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