Patent ID: 11920011
Assignee: SHIN-ETSU CHEMICAL CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC C | IPC C

Claim 4:
5. A resin substrate comprising an organic resin, a quartz glass cloth, and a silica powder having a dielectric loss tangent of 0.0001 to 0.0015 at 10 GHz, wherein
the organic resin has a dielectric loss tangent of 0.0002 to 0.0020 measured at 10 GHz and a ratio of a dielectric loss tangent at 40 GHz to a dielectric loss tangent at 10 GHz (40 GHz/10 GHz ratio) is 0.4 to 0.9,
the quartz glass cloth has a dielectric loss tangent of 0.0001 to 0.0015 measured at 10 GHz and a ratio of a dielectric loss tangent at 40 GHz to a dielectric loss tangent at 10 GHz (40 GHz/10 GHz ratio) is 1.2 to 2.0, and
the resin substrate has a dielectric loss tangent of 0.0001 to 0.0020 at 10 GHz and a ratio of a dielectric loss tangent at 40 GHz to a dielectric loss tangent at 10 GHz (40 GHz/10 GHz ratio) is 0.8 to 1.2.