Circuit Board Convex Post Manufacturing Method

The patent introduces a convex-shaped protrusion on the post portion as an intermediary structural element that extends into the opening portion of the wiring board. This protrusion acts as a mediator between the post portion and the circuit pattern, physically preventing direct contact while maintaining the bonding function. The protrusion's convex shape allows it to engage with the opening portion without touching the circuit pattern, thus resolving the contradiction between manufacturing simplicity and short-circuit prevention.

The patent applies partial action by designing the protrusion to extend only partially into the opening portion, rather than completely through it. The protrusion's height is carefully controlled to reach a position where it prevents contact with the circuit pattern but does not extend excessively deep. This partial insertion provides just enough separation to prevent short-circuits while maintaining adequate bonding strength between the post portion and the wiring board.

The patent segments the opening portion into functional zones: an upper wider section that facilitates easy insertion of the post portion, and a lower narrower section that provides precise positioning. The convex-shaped protrusion on the post portion corresponds to this segmented opening structure, allowing the post to be easily inserted through the wider upper section while the lower section constrains the final position to prevent contact with the circuit pattern. This segmentation resolves the contradiction between ease of assembly and positioning precision.