Abstract: A process in which a base metal film is formed on the surface of a plastic film using a dry plating process, and a liquid containing an organic monomer is then brought in contact with the base metal film, thereby selectively forming a conductive organic polymer coating within any pinhole defects, and effectively filling the defects. A metal film is then formed on top of the base metal film using an electroplating process, thus forming a metal wet plating layer.

Abstract: A process in which a base metal film is formed on the surface of a plastic film using a dry plating process, and a liquid containing an organic monomer is then brought in contact with the base metal film, thereby selectively forming a conductive organic polymer coating within any pinhole defects, and effectively filling the defects. A metal film is then formed on top of the base metal film using an electroplating process, thus forming a metal wet plating layer.

Abstract: A surface treated metallic material according to the present invention comprises a metallic substrate and a metallic compound layer formed thereon, wherein the entire surface of the metallic compound layer is covered with minute, upright, scaly protrusions. The width in the major axial direction of the scaly protrusions is between 0.05˜0.5 &mgr;m and the thickness between 0.01˜0.1 &mgr;m, and the thickness of the metallic compound layer is between 0.1˜1.0 &mgr;m. The metallic compound layer incorporates one, or two or more of, the materials selected from the group consisting of chromium oxide, chromium hydroxide, niobium oxide, niobium hydroxide, rhodium oxide, rhodium hydroxide, vanadium oxide, vanadium hydroxide, palladium oxide, palladium hydroxide, nickel oxide, and nickel hydroxide. By using surface treated metallic materials of this type, bonding strength to a resin layer can be improved.

Abstract: A lead frame material comprises a base plate consisting of copper or copper alloys, and a protective coating formed on the upper or the both surface of the base plate. The protective coating is composed of at least one metal selected from the group consisting of gold, gold alloy, silver, silver alloy, palladium and palladium alloy, and has a thickness of 10-500 angstrom. The protective coating is formed by means of vapor deposition. It is possible to form an intermediate coating of nickel or nickel alloys between the surface of the base plate and the protective coating, by means of vapor deposition or wet plating. The suitable thickness of the intermediate coating is within the range of 50-20000 angstrom.

Abstract: According to a path correction method in an automatic welding machine in accordance with the invention, the torch TC of a welding machine is grasped by a robot and welding is performed while the welding torch is weaved to the left and right of a welding line. At such time, an integrated value of welding current of the torch weaved with respect to a given welding line is computed every half cycle, the correction direction is decided, the amount of correction is decided by performing a computation, which is based on the integrated value, in dependence upon the correction direction decided, and the weaving path of the torch is corrected by multiplying the decided amount of correction by a predetermined coefficient.

Abstract: An automatic welding apparatus carrying out an arc sensing operation is provided with a memory (2) storing parameters for arc sensing, and these parameters being rewritten by a manual input before beginning the welding, by an input from an on-line computer during the welding, or at a predetermined time by a program which outputs commands to the automatic welding apparatus (FIG. 6).

Abstract: A method of starting arc sensing applicable to automatic welding apparatuses carrying out an arc sensing operation, which is a control operation comprising: detecting deviations of a welding electrode from a predetermined path in an up or down direction and right or left direction, by variations of a welding current while welding with a weaving operation; and correcting the deviation.In this method of starting arc sensing, the welding electrode is held in the dwell state while the arc is extremely unstable just after the arc is first generated, a weaving is carried out from a first predetermined time (T.sub.1) after the extreme instability of the arc has been eliminated, a detection and correction by an arc sensing of a deviation in the right and left direction only are carried out from a second predetermined time (T.sub.

Abstract: The arc current is divided into two areas each corresponding to a 1/4 period of weaving, the two areas are compared with each other, and an area corresponding to a predetermined time period at the end portion of the larger area is substrated from the larger area and another area comparison is performed. The movement of the welding torch is compensated in accordance with the predetermined correction function, so that, even when an actual weld line of base metals to be welded deviates from an instructed weld line, the welding torch is correctly moved along the weld line of the base materials and arc welding is performed.