Abstract:
Laminated synthetic mica articles are disclosed that have particular applicability as substrates in electronic components. The articles comprise a core of stacked and consolidated, synthetic mica sheets that are impregnated with resin, and a copper foil sealed to a face on the article. Adherence of the copper foil is enhanced by use of a micaceous facing layer and bonding sheet, both being resin-impregnated and the resin cure being advanced beyond the normal B-stage level before assembly. Insulation resistance is enhanced by providing an advanced resin coating on the copper foil before assembly. Use of a bismaleimide triazine and epoxy mixed resin is also disclosed whereby a transformation temperature (Tg) of about 200°C. is obtained.
Abstract:
A polyphenylene sulphide composition useful for plating is disclosed, comprising a polyphenylene sulphide resin, glass fibres, and potassium titanate fibres. Moulded articles of this composition, when plated after etching, provide a plated article which has a good appearance and good peel strength. Thus these plated articles can be used in outer applications, such as for electrical parts and automobile parts.
Abstract:
Thermotropic liquid crystalline polymers are readily ground to smaller particle sizes by using a two or more stage grinding process. The particles produced usually are relatively short, but still, fibers. The ground LCP is useful for rotational molding, powder coating, and forming nonwoven structures.
Abstract:
A pre-preg substrate, having a low dielectric constant and containing a substantially uniformly distributed hollow-glass-microsphere filler, and method for making the same. The pre-preg substrate is treated with impregnation and lamination techniques to form a laminate with a low dielectric constant, and good mechanical and electrical properties, suitable as a base material for surface mounted devices in high performance circuits. Improved pre-pregs for making high performance circuit boards and for making surface mounted integrated circuits. Improved high performance circuit boards for making surface mounted integrated circuits.
Abstract:
The invention aims at providing a resin composition for electronic parts which is in great demand as a circuit board material for electric and electronic equipments, and which has a low dielectric constant, low dielectric dissipation factor and a thermal resistance. This resin consists of a thermoplastic resin or a thermosetting resin, and wollastonite or zonotolite, fibrous material containing CaO.SiO₂ as a main component, mixed as reinforcing fiber with the resin at a mixing ratio of 5-60 % based on the total weight of the resin and fiber.