| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring circuit board capable of fully preventing the occurrence of a cross talk between a plurality of conductors, and to provide a production method thereof. SOLUTION: A first insulating layer 41 is formed on a suspension body part 10, and a wiring pattern for writing W1 and a wiring pattern for reading R1 are formed on the first insulating layer 41. The wiring patterns W1, R1 are aligned at a predetermined interval. A second insulating layer 42 is formed on the first insulating layer 41 so as to cover the wiring patterns W1, R1, and a third insulating layer 43 is formed on the second insulating layer 42. On the third insulating layer 43, at a position over the wiring pattern for writing W1, a wiring pattern for writing W2 is formed, and at a position over the wiring pattern for reading R1, a wiring pattern for reading R2 is formed. A fourth insulating layer 44 is formed on the third insulating layer 43 so as to cover the wiring patterns W2, R2. The dielectric constant of the third insulating layer 43 is smaller than either that of the second insulating layer 42 or of the fourth insulating layer 44. COPYRIGHT: (C)2009,JPO&INPIT |
