| 摘要 |
PROBLEM TO BE SOLVED: To realize a small output from a thermal head and the saving of a component cost while keeping a handling ease by using a locked-in stress radially generated centering around microrecessed parts effectively and positively, in a stencil for stencil printing with numerous microrecessed parts. SOLUTION: In the stencil 1 for stencil printing made of a thermoplastic resin with numerous microrecessed parts 2 formed on one surface, the microrecessed parts 2 are almost uniformly distributed across the maximum imaging range of the stencil 1. The radial locked-in stress is generated in such a way that the formation range S2 of the radial locked-in stress generated centering around each microrecessed part 2 during its formation, is present in the ratio of not less than 20% to the maximum imaging range of the stencil 1. The formation range S2 of the radial locked-in stress is confirmed by holding the stencil 1 between two polarizing plates arranged so as to allow the oscillating directions of a polarized light to be orthogonal to each other and observing a transmitted light. Also, the method for detecting the radial locked-in stress of the stencil 1 is provided. COPYRIGHT: (C)2005,JPO&NCIPI
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