第１８回知的財産翻訳検定＜第１０回和文英訳＞
１級

機械工学

標準解答

問１[0002]
Fig. 1 illustrates an example of a conventional organic material spray nozzle.

A spraynozzle 10 is coupled to an outer wall 21 of a chamber by a screwing coupler 12 or the like.
[0003]
The chamber 20 and spray nozzle 10 are heated to a high temperature by heat transferredfrom vaporized source material, which passes through an outlet orifice 11 in contact therewith during
a vapor deposition process. Thereafter, the temperature of these members returns to a cool state. As
this vapor deposition process is repeatedly performed, the chamber 20 and spray nozzle 10 are
subjected to repeated loading, where expansion and contraction repeatedly occur due to repeatedheating.

Such heat-induced repeated loading may cause cracks or looseness to occur at the portionof the screwing coupler 12 between the spray nozzle 10 and the outer wall 21 of the chamber, which
may lead to minute gaps being formed between the spray nozzle 10 and the outer wall 21.
[0004]Such damage to the coupling portion of the spray nozzle 10 and the outer wall 21 of thechamber may result in the vaporized source material within the chamber leaking out through thisdamaged portion.

Not only is expensive source material lost, but also contamination becomesproblematic as the source material reaches areas other than a target substrate.

問２[0010]
Fig. 1 is a cross-sectional view of a porous plastic bearing according to a first embodiment,and Fig. 2 is a cross-sectional view taken along II-II in Fig. 1. In Figs. 1 and 2, reference numeral 1
denotes a shaft (rotation shaft), and 2 denotes a porous plastic plain bearing which rotatably bears
the shaft 1. This plain bearing 2 is formed as a collective sintered object of plastic pellets 3 ofacrylonitrile butadiene styrene (ABS) resin, this collective sintered object having been impregnatedwith a liquid lubrication oil 4.

Pores 3a are formed between the plastic pellets 3, through which theliquid lubrication oil 4 flows, and seeps out on the inner face of the plain bearing 2.
[0011]
More specifically, the plain bearing 2 is formed by a collection of many (multiple) plasticpellets 3, each having a volume of 0.004 to 4 cubic millimeters, being sintered such that the porosity
among the plastic pellets 3 is 10 to 30%.

[0012]As the shaft 1 rotates, negative pressure is generated at the anti-load side, between theshaft 1 and the inner face of the bearing 2.

This causes the liquid lubrication oil 4, standing

between the plastic pellets 3 of the plain bearing 2, to seep out onto the inner face of the bearing 2,
and travel to the load portion where the inner face of the bearing 2 and the shaft 1 are in closest
proximity.

Positive pressure is generated at this load, whereby contact between the shaft 1 and thebearing 2 is averted.

Accordingly, frictional resistance between the shaft 1 and bearing 2 isreduced.
問３（１）step の語を使用するクレーム
1.

A method for manufacturing a gear, comprising:a gear machining step of machining a steel material to obtain a gear with apredetermined shape; anda quenching step of quenching the obtained gear by increasing a temperatureof the gear into an austenite region and then rapidly decreasing the temperature of thegear into a martensite region under an atmosphere containing a carbon-based gas andan ammonia gas,
wherein the quenching step includes providing a retained austenite at anoutermost surface including a tooth surface of the gear at an amount of 40 to 80
volume%.
（２）step の語を使用しないクレーム
1.

A method for manufacturing a gear, comprising:machining a steel material to obtain a gear with a predetermined shape; andquenching the obtained gear by increasing a temperature of the gear into an

austenite region and then rapidly decreasing the temperature of the gear into amartensite region under an atmosphere containing a carbon-based gas and an ammonia
gas,
wherein the quenching includes providing a retained austenite at an outermost
surface including a tooth surface of the gear at an amount of 40 to 80 volume%.