| 摘要 |
A cleaning sheet has a disc-shaped substrate. First and second polishing layers are disposed over the substrate. The first polishing layer has a surface formed in a surface-roughened fashion to polish a tip section of each probe needle and has the function of removing adherents leading to inhibition of electrical conduction, which have been adhered to the tip of the needle in a coating or film form. The second polishing layer is a layer in which a large number of polishing grains are mixed into an elastic member and has the function of sticking the tip of the probe needle into the elastic member to remove foreign substances. The height of the surface of the second polishing layer is set so as to become identical to or slightly higher than that of the surface of the first polishing layer.
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