Abstract:
Compositions and processes for the preparation of printed circuits from epoxy compositions are provided. The epoxy compositions exhibit low viscosity in the uncured state and low coefficient of thermal expansion in the cured state. The low dielectric constant compositions of the invention are well-suited for use in multi-layer printed circuit boards.
Abstract:
Compositions and processes for the preparation of printed circuits from epoxy compositions are provided. The epoxy compositions exhibit low viscosity in the uncured state and low coefficient of thermal expansion in the cured state. The low dielectric constant compositions of the invention are well-suited for use in multi-layer printed circuit boards.
Abstract:
The present invention relates to an apparatus and a process for a half-cell structure to make a hexagonal-cell honeycomb core. The structure has a plurality of peaks and valleys and a diagonal surface between each consecutive peak and valley. The apparatus comprises a stack holder for stacking the structure so that as one sheet is placed on top of a stack comprising at least one sheet, the peaks of one sheet contact the peaks of an adjacent sheet. The apparatus also comprises an air blower disposed beneath the top of the stack for reducing the air pressure surrounding the stack to a pressure below the air pressure on the top of the stack, thereby pressing the layers together to form the core.
Abstract:
Provided is a film having a thickness of less than 500 μm comprising a polymer and a plurality of surface-modified hexagonal boron nitride particles dispersed therewithin. The polymers can be polyimide or epoxy. A process for preparing the film by casting is provided.
Abstract:
Provided, are multi-layer chip carriers comprising an asymmetric cross-linked polymeric dielectric film, and processes for making the chip carriers.
Abstract:
Cross-linked polymeric films suitable for use as a dielectric build-up layer in multi-layer chip carriers are provided. The films are suitable for use in any application using films that are dimensionally stable to temperature changes.
Abstract:
Epoxy compositions that exhibit low viscosity in the uncured state and low coefficient of thermal expansion in the cured state are provided. The compositions are well-suited for use as dielectrics in electronics applications such as in multi-layer printed circuit boards, integrated circuit (IC) chip substrates, also known as IC chip carriers, and IC chip package interposers.