Abstract: A method is disclosed for constructing a dual-sided chip package onto a leadframe having a die pad and a set of lead fingers corresponding to the die pad. Integrated circuit dies are disposed onto each side of the die pad while the leadframe is supported with support blocks having cavities that accept the integrated circuit dies and that support each lead finger and that provide clearance for stitch bonds of the previously formed wire bonds. Thereafter, a one step plastic mold is formed around each assembly comprising the dual integrated circuit dies, the die pads, and the wire bonds.

Abstract: A method is disclosed for constructing a dual-sided chip package onto a leadframe having a die pad and a set of lead fingers corresponding to the die pad. Integrated circuit dies are disposed onto each side of the die pad while the leadframe is supported with support blocks having cavities that accept the integrated circuit dies and that support each lead finger and that provide clearance for stitch bonds of the previously formed wire bonds. Thereafter, a one step plastic mold is formed around each assembly comprising the dual integrated circuit dies, the die pads, and the wire bonds.

Abstract: A data-transfer controlling system comprising a bus-control unit connected to a common bus for controlling data transfer through the bus and a plurality of transmitter/receiver units for transferring data through the common bus to each other. The bus is comprised of a transfer-request signal line connected to each of the transmitter/receiver units, one or two permission-signal lines, for permitting transfer of data by a transmitter/receiver unit which has been generating a transfer-request signal, an acknowledge signal line, and a transfer-end signal line. The bus does not include a busy-interlock signal line, which was included in the prior art. The transmitter/receiver unit which has received the permission signal begins to transfer data when both of the permission signal and the transfer-end signal are terminated.

Abstract: Successive field intervals of a composite color television signal are respectively recorded on successive recording tracks which extend parallel to one another on a record medium such as a magnetic tape. During the reproduction of a color television signal in a conventional VTR (video tape recorder), successive field intervals of the color television signal are alternately reproduced from the successive record tracks by means of two signal reproducing heads which are switched alternately.

Abstract: A method of surface hardening for forming a hardened layer of cemented carbide, including cementite, on a local surface area of cast iron by rapidly melting the local surface by means of a rapid melting process such as the electron bombardment melting process to form a molten pool thereon, then rapidly cooling the molten pool by the chilling effect of the non-molten portion of cast iron and finally finishing the cast iron having the hardened layer thus formed to a desired shape. To this end, the cast iron used contains therein one or a mixture of deoxidizing agents such as aluminum, magnesium and calcium.