B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 35/363 (2006.01) B23K 35/02 (2006.01) B23K 35/36 (2006.01) H05K 3/34 (2006.01)
Patent
CA 2385904
There is provided a solder work material for forming solder-coated circuit boards, which is capable of preventing the malfunction of circuit that may be caused to generate by voltage noises that tend to be generated by the volumetrical expansion of the flux residue in a soldered laminated ceramic capacitor, etc. even under the environments where temperatures fluctuate widely (for example, -40°C to +85°C), or that may be caused to generate by voltage noises to be generated by the fluctuation of parasitic capacity between circuits which may be caused to generate due to a flux residue. There is also provided a circuit board having a residual film of flux left thereon after the deposition of the solder work material. This solder work material is formed of a solder paste composition or a resin flux-cored solder, both comprising a flux containing, as a resin component, acrylic resin for preventing the generation of voltage noises in electronic devices. The circuit board is accompanied with a residual film of such a flux.
Gido Takanobu
Nomura Masahiro
Oga Toshiyuki
Ono Takao
Sasaki Rika
Corporation Nec
Hughes Ivor M.
Tamura Kaken Corporation
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