Abstract: An object of the present invention is to provide a lubricant base oil for power transmission (in particular, a lubricant base oil for traction drives) having a high traction coefficient and a high flash point. The present invention relates to a lubricant base oil for power transmission comprising an alicyclic dicarboxylic acid diester compound represented by general formula (1): wherein R1 to R5 are the same or different, and each represents hydrogen or linear or branched C1-4 alkyl, and two R1, two R2, two R3, two R4, and two R5 may respectively be the same or different; and ring A is wherein R represents C1-3 alkyl, and n represents 0, 1, or 2; when n represents 2, R may be the same or different.

Abstract: An object of the present invention is to provide a lubricant base oil for power transmission (in particular, a lubricant base oil for traction drives) having a high traction coefficient and a high flash point. The present invention relates to a lubricant base oil for power transmission comprising an alicyclic dicarboxylic acid diester compound represented by general formula (1): wherein R1 to R5 are the same or different, and each represents hydrogen or linear or branched C1-4 alkyl, and two R1, two R2, two R3, two R4, and two R5 may respectively be the same or different; and ring A is wherein R represents C1-3 alkyl, and n represents 0, 1, or 2; when n represents 2, R may be the same or different.

Abstract: An object of this invention is to provide a lubricating base oil that has a small rate of change in viscosity (a high viscosity index) over a wide temperature range, low viscosity at low temperatures, and good low-temperature fluidity and evaporation resistance, and that allows reduced decomposition thereof. To achieve the object, methylpentanediol diesters obtained by using specific aliphatic monocarboxylic acids are used as a lubricating base oil.

Abstract: An object of this invention is to provide a lubricating base oil that has a small rate of change in viscosity (a high viscosity index) over a wide temperature range, low viscosity at low temperatures, and good low-temperature fluidity and evaporation resistance, and that allows reduced decomposition thereof. To achieve the object, methylpentanediol diesters obtained by using specific aliphatic monocarboxylic acids are used as a lubricating base oil.

Abstract: A semiconductor device includes a semiconductor chip, an electrode pad formed on the semiconductor chip, an underlying barrier metal formed on the electrode pad, a solder bump formed on the underlying barrier metal, and an underfill material surrounding the underlying barrier metal and the solder bump. A junction interface of the solder bump with the underlying barrier metal corresponds to an upper surface of the underlying barrier metal, and a portion of the underfill material bonded to a side surface of the solder bump and an end surface of the underlying barrier metal forms a right angle or an obtuse angle.

Abstract: A semiconductor device includes a semiconductor chip, an electrode pad formed on the semiconductor chip, an underlying barrier metal formed on the electrode pad, a solder bump formed on the underlying barrier metal, and an underfill material surrounding the underlying barrier metal and the solder bump. A junction interface of the solder bump with the underlying barrier metal corresponds to an upper surface of the underlying barrier metal, and a portion of the underfill material bonded to a side surface of the solder bump and an end surface of the underlying barrier metal forms a right angle or an obtuse angle.

Abstract: A liquid pressure transfer printing apparatus in which a work to be applied with transfer printing is urged onto a film for applying liquid pressure transfer printing supplied to the surface of a liquid in a tank for liquid pressure transfer printing to submerge the film into the liquid comprises a pair of gates each having a suction mechanism for sucking residues not transferred to the submerged work but remained on the surface of the liquid in the tank from the inlet side and the exit side of the tank while the work W is submerged in the liquid, thereby capable of preventing the residues of the film remained on the surface of the liquid in the tank not transferred to the surface of the work from depositing to the surface of the work and forming seeds.