摘要:
An electronic apparatus includes, for example, a circuit board with an electronic component and a piezoelectric element, a reference potential pattern that gives a reference potential to at least one of the electronic component and the piezoelectric element, and a solder land connected to the reference potential pattern. On the circuit board, the electronic component is located on a downstream side in a transport direction of the circuit board during mounting of the piezoelectric element and the electronic component on the solder land, and the piezoelectric element is located on an upstream side in the transport direction.
摘要:
PROBLEM TO BE SOLVED: To protect a semiconductor component with an inexpensive and simple method from a discharge generated from a piezoelectric element owing to the pyroelectric effect in a process of a flow soldering. SOLUTION: An electronic device includes, for instance, a printed circuit board soldered with the use of a solder jet flow, a semiconductor component provided on the printed circuit board, and a piezoelectric element provided on the printed circuit board. Further, the electronic device includes a reference potential pattern and a land. The reference potential pattern imparts a reference potential to at least one of the semiconductor component and the piezoelectric element. The land is provided between the semiconductor component and the piezoelectric element, connected to the reference potential pattern, and formed by exposing the wiring part from a solder resist layer of the printed-wiring board. This causes the discharge current generated in the piezoelectric element owing to the pyroelectric effect in a process of the flow soldering using the solder jet flow to flow on a discharge channel formed by the piezoelectric, the land, the reference potential pattern, and the solder jet flow. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a mounting technique for increasing a permissible amount of warpage by suppressing the occurrence of a bridge defect by releasing excessive solder to a pattern arranged at a periphery of a land. SOLUTION: A printed circuit board 1 on which an electronic component with many lattice-shaped bottom surface electrodes is mounted has patterns 40 to which excessive solder is stuck and which are formed at fixed intervals in a diagonal direction of a land 10 on the printed circuit board opposed to the electrodes of the electronic component, wherein one or a plurality of patterns 40 are arranged in conformity with warpage shape of the component and of the printed circuit board 1. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To prevent reduction of a wiring flexibility for the board with use of lands for preventing solder bridge. SOLUTION: A printed circuit board has first solder lands for soldering of an electronic component, second solder lands for accumulation of solder located close to the first lands, and a signal line pattern provided between the first and second lands. COPYRIGHT: (C)2010,JPO&INPIT