Shin-etsu Chemical Co., Ltd.

Nichia Corporation

Yusuke Taguchi

Toshio Shiobara

Junichi Sawada

Kazutoshi Tomiyoshi

Ryunosuke Nomura

Tsutomu Kashiwagi

Kenji Hagiwara

Hajime Itokawa

Tomoyoshi Tada

Masaki Hayashi

Hisashi Shimizu

Shoichi Osada

Yuya Katsushika

A low dielectric substrate for high-speed millimeter-wave communication includes a quartz glass cloth with a dielectric loss tangent of 0.0001 to 0.0015 and a dielectric constant of 3.0 to 3.8 at 10 GHz, and an organic resin with a dielectric loss tangent within 80% to 150% of the dielectric loss tangent of the quartz glass cloth at 10 GHz and a dielectric constant within 50% to 110% of the dielectric constant of the quartz glass cloth at 10 GHz. This provides a low dielectric substrate for high-speed millimeter-wave communication where the low dielectric substrate makes it possible to send signals that are stable and have excellent quality with no difference in propagation time between wirings even if the substrate has an uneven resin distribution and the quartz glass cloth above and below the wirings, and the difference in dielectric loss tangent between members has been reduced to lower transmission loss.

Low dielectric substrate for high-speed millimeter-wave communication

The present invention is a resin substrate including an organic resin and a quartz glass cloth, where the organic resin has a dielectric loss tangent of 0.0002 to 0.0020 measured at 10 GHz and a 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 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 40 GHz/10 GHz ratio is 0.8 to 1.2. This provides a resin substrate having a low dielectric loss tangent in a high-frequency region and dielectric characteristics with little frequency dependence.

Resin substrate having dielectric characteristics with little frequency dependence

The present invention is a low dielectric resin substrate, which is a composite including an annealed quartz glass cloth and an organic resin, where the annealed quartz glass cloth has a dielectric loss tangent of less than 0.0010 at 10 GHz, and tensile strength of 1.0 N/25 mm or more per cloth weight (g/m). This provides a resin substrate that includes a quartz glass cloth which has a low dielectric loss tangent and which is also excellent in tensile strength.

Low dielectric resin substrate

A thermosetting epoxy resin composition comprising (A) a reaction mixture of a triazine derivative epoxy resin and an acid anhydride at a ratio of the epoxy group equivalent to the acid anhydride equivalent of 0.6 to 2.0; (B) an internal mold release agent; (C) a reflective material; (D) an inorganic filler; and (E) a curing catalyst. The internal mold release agent of component (B) comprises a carboxylate ester represented by:R&#x2014;COO&#x2014;R&#x2003;&#x2003;(1)wherein Rand Rare CHand n is 1 to 30 and a compound represented by: wherein R, R, and Rare selected from H, &#x2014;OH, &#x2014;OR, and &#x2014;OCOCHwith the proviso that at least one includes &#x2014;OCOCH; R is CH(wherein n is an integer of 1 to 30), a is 10 to 30, and b is 17 to 61.

Thermosetting epoxy resin composition and semiconductor device

A surface-mount light emitting device is provided comprising a light emitting element (), a reflector () which is molded integral with a leadframe () having the light emitting element mounted thereon, and an encapsulating resin composition (). The reflector is molded from a heat curable resin composition to define a recess with bottom and side walls. The resin side wall has a thickness of 50-500 &#x3bc;m. The encapsulating resin composition is a heat curable resin composition having a hardness of 30-70 Shore D units in the cured state.

Surface-mount light emitting device

A purpose of the present invention is to provide an underfill composition for optical semiconductor devices which can provide a cured product whose moldability, adhesiveness to a gold bump, heat-resistance, and light resistance are better. The present invention is an underfill composition, comprising (A) 60 to 99 parts by weight of a branched organopolysiloxane having a weight average molecular weight of from 500 to 20000, reduced to polystyrene, and represented by the average compositional formula (1); (B) 250 to 1000 parts by weight of an inorganic filler; (C) 0.01 to 10 parts by weight of a condensation catalyst; (D) 1 to 40 parts by weight of an organopolysiloxane having a linear diorganopolysiloxane moiety, represented by the formula (2), provided that a total amount of component (A) and component (D) is 100 parts by weight; and (E) 0.2 to 2.0 parts by weight of silane coupling agent.

Underfill composition and an optical semiconductor device

Disclosed herein is a resin composition including 100 parts by weight of an organic resin and 50 to 1,000 parts by weight of an inorganic filler, wherein 10 to 100% of the inorganic filler is composed of an oxide of a rare earth element.

Resin composition, reflector for light-emitting semiconductor device, and light-emitting semiconductor unit

A heat-curable silicone resin-epoxy resin composition that is ideal as a premolded package for a high-brightness LED or solar cell. The composition contains (A) a heat-curable silicone resin, (B) a combination of a triazine derivative epoxy resin and an acid anhydride, or a prepolymer obtained by reaction of them, (C) an inorganic filler, and (D) a curing accelerator. The composition exhibits excellent curability, and yields a uniform cured product that displays excellent retention of heat resistance and light resistance over long periods of time, and suffers minimal yellowing.

Heat-curable silicone resin-epoxy resin composition, and premolded package molded from same

Silicone resin composition for optical semiconductor devices, providing cured product wherein warpage in the devices is reduced and whiteness, heat-resistance, and light resistance are improved. The composition comprises: (A) an organopolysiloxane of the formula(CH)Si(OR)(OH)O&#x2003;&#x2003;(1) 

Silicone resin composition for optical semiconductor devices and an optical semiconductor device

A white heat-curable silicone resin composition comprising (A) a heat-curable organopolysiloxane, (B) a white pigment, (C) an inorganic filler, and (D) a condensation catalyst cures into a white uniform product having heat resistance, light resistance and minimal yellowing. The cured composition has a thermal conductivity of 1-10 W/mK. The composition is useful for forming cases on optoelectronic parts, typically LED.

White heat-curable silicone resin composition and optoelectronic part case

A heat-curable resin composition that yields a cured product having excellent heat resistance and light resistance, and a premolded package molded using the composition. The heat-curable resin composition comprises components (A) to (E) listed below: (A) an isocyanuric acid derivative containing at least one epoxy group within each molecule, in an amount of 100 parts by mass, (B) a silicone resin containing at least one epoxy group within each molecule, in an amount of 10 to 1,000 parts by mass, (C) an acid anhydride curing agent, in an amount such that the ratio of [total epoxy group equivalents within component (A) and component (B)/carboxyl group equivalents within component (C)] is within a range from 0.6 to 2.2, (D) a curing accelerator, in an amount within a range from 0.05 to 5 parts by mass per 100 parts by mass of the combined mass of components (A), (B) and (C), and (E) an inorganic filler, in an amount of 200 to 1,000 parts by mass per 100 parts by mass of the combined mass of components (A), (B) and (C).

Heat-curable resin composition

A white heat-curable silicone/epoxy hybrid resin composition is provided comprising (A) a heat-curable silicone resin, (B) a triazine derived epoxy resin composition, (C) a white pigment, (D) an inorganic filler, and (E) an antioxidant. Antioxidant (E) is a phosphite compound having formula: P(OR)(OR)wherein Rand Rare organic groups of at least 6 carbon atoms. Components (A) and (B) are present in a weight ratio of from 5:95 to 95:5. The composition effectively cures into a product maintaining heat resistance, light resistance and improved strength over a long term.

White heat-curable silicone/epoxy hybrid resin composition for optoelectronic use, making method, premolded package, and LED device

The present invention provides a silicone resin composition for an optical semiconductor device, comprising 

Silicone resin composition for optical semiconductor devices

A white heat-curable silicone resin composition comprising (A) a heat-curable organopolysiloxane, (B) a white pigment, (C) an inorganic filler, and (D) a condensation catalyst cures into a white uniform product having heat resistance, light resistance and minimal yellowing. The cured composition has a reflectance of at least 80% at wavelength 350-400 nm. The composition is useful for forming cases on optoelectronic parts, typically LED.

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Annaka, Japan

Yusuke Taguchi