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

Claim 10:
11. A resin substrate comprising an organic resin and a quartz glass cloth, 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,
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, and
the organic resin is a thermosetting resin and the thermosetting resin is a bismaleimide resin shown by the following general formula,, , wherein A independently represents a tetravalent organic group including an aromatic ring or an aliphatic ring; B represents an alkylene chain having 6 to 18 carbon atoms and having an aliphatic ring optionally containing a divalent heteroatom; Q independently represents a linear alkylene group having 6 or more carbon atoms; R independently represents a linear or branched alkyl group having 6 or more carbon atoms; “n” represents a number of 1 to 10; and “m” represents a number of 0 to 10.