Abstract: A cache memory built in a processor comprising a plurality of independent memory blocks, pass/fail information memory unit memorizing a presence/absence of a failure occurring in each of the memory blocks, and a screening control function substituting a sound memory block for a failed memory block based on a memory content in the pass/fail information memory unit.

Abstract: The present invention provides a solder deposition method that includes the step of forming a dam around an electrode on a substrate, the step of applying a solder precipitating composition to the substrate, and the step of depositing solder on the surface of the electrode while heating the solder precipitating composition applied. This solder deposition method is suitable for forming large bumps at fine pitches. In particular, it is capable of depositing solder in a desired height precisely and easily, and yet preventing occurrence of voids.

Abstract: An Sn--Bi alloy-plating bath comprises (i) Bi ions, (ii) Sn ions, (iii) ions of one metal selected from the group consisting of Cu, Co and Ag, and (iv) one member selected from the group consisting of carboxylic acids, lactone compounds, alkanesulfonic acids, alkanolsulfonic aicds, phenolsulfonic acids and salts thereof and is substantially free of lead ions. The bath permits the formation of an Sn--Bi alloy-plated film, does not form any plated film having impaired quality even at a temperature higher than about 100.degree. C. and does not form any whisker.

Abstract: A press machine, whose set operating conditions, pressing state, etc., can be easily grasped and whose safety and operability in the pressing operation can be improved, has a console panel (26) provided with a crank angle display (70), a pressing state display (80), a sheet switch (106) for inputting control information into a control section, and a multi-display (102) capable of displaying a plurality of pieces of the control information at a time. The crank angle display (70) can be constituted of multiple light emitting sections (72) arranged into a circle, and successive ones (72a) of the light emitting sections (72) whose number corresponds to the crank angle can be turned on.

Abstract: A Sn--Bi alloy plating bath comprises at least one compound selected from the group consisting of polyoxy monocarboxylic acids, polyoxy lactones, polycarboxylic acids and salts thereof. A plating method comprises the step of applying a Sn--Bi alloy plating film to a substrate in the foregoing plating bath. The plating bath permits the formation of a Sn--Bi alloy plating film having a bismuth content ranging from 0.1 to 75% over a wide current density range. Moreover, the plating bath never forms precipitates, does not become turbid, does not cause any change of the bath composition and is, therefore, quite stable even when it is stored over a long period of time.

Abstract: A tin-zinc alloy electroplating bath comprises an amphoteric surfactant, a water-soluble stannous salt, a water-soluble zinc salt and a balance of water. When the tin-zinc alloy plating bath of the present invention is used, the formed coating film comprises a uniform alloy composition even in case where the current density varies over a wide range. Therefore, the coating film having the uniform alloy composition can be formed even on the substance having a complicated shape and the chromate treatment becomes satisfactory. As a result, the effect of the coating is improved, the resultant product is stable and the productivity is improved. Thus the tin-zinc alloy coating film having a high quality can be provided.

Abstract: A chemically stable black chromate solution capable of forming an anticorrosive black chromate film on a Zn-Ni alloy plating is provided, the components being easily soluble in the solution. The black chromate solution comprises 1 to 50 g/l of hexavalent chromium; 1 to 50 g/l of sulfate ion; 0.05 to 1.0 g/l of soluble silver; 0.5 to 100 g/l of a sulfonated carboxylic acid selected from the group consisting of sulfo-aromatic carboxylic acids having 7 to 15 carbon atoms, sulfonated aliphatic dicarboxylic acids having 3 to 10 carbon atoms and salts thereof; and a balance of water, the solution having a pH of 0.5 to 2.5.

Abstract: The invention provides an electroplating bath for forming a zinc-nickel alloy coating consisting essentially of water, about 1 to 70 grams/liter of zinc, about 0.6 to 118 grams per liter of nickel, at least one compound from the group consisting of (i) aliphatic amines in an amount not more than 16 grams/liter, (ii) polymers of aliphatic amines in an amount not more than about 20 grams per liter and (iii) a compound selected from the group consisting of hydroxyaliphatic carboxylic acids and salts thereof in an amount from 0 to 2 mols/liter, said bath having a pH of more than 11. The invention also provides an electroplating method for forming a chromate coating on a zinc-nickel alloy coating electrolytically deposited from the electroplating bath defined in the preceding sentence on electrically conductive metalics matrix material, and forming a chromate coating on the zinc-nickel alloy coating by means of a chromate treatment.

Abstract: A vehicle slip protector including a frame to be fixed to a vehicle wheel for rotation therewith, spokes extending radially outward from the center axis of the frame which is aligned with the axle of the wheel, so as to be radially reciprocally slidably mounted to the frame, elastic shoes attached to the outer ends of the spokes, coils on the spokes urging the shoes radially outward to contact a road surface, and spikes embedded in the shoes for projecting outwardly of the shoes into contact with the road surface in response to a predetermined radial compression of the shoes applied by the coil springs while the elastic shoes are in contact with the road surface.