Lead Frame Bent Isolation Region Crack Prevention

The lead frame is divided into multiple unit regions, each containing isolated positive and negative leads. The isolation parts between adjacent unit regions are segmented and independently structured, allowing each segment to manage stress locally without transmitting cracks across the entire structure.

The isolation parts are given special local structural characteristics with extended leads that form bent structures. These localized structural modifications at the isolation regions provide enhanced stress distribution and crack resistance specifically where needed, without complicating the entire lead frame structure.

The leads in the isolation parts are extended and bent in advance during lead frame manufacturing to create a preliminary stress-distributing structure. This pre-configured geometry prepares the isolation regions to withstand molding stresses and prevent crack formation during the resin molding process.

The leads in the isolation parts are formed with bent structures rather than straight configurations. These curved geometries distribute mechanical stresses more evenly during resin molding, preventing stress concentration that would lead to cracks in the isolation regions.

The existing leads in the isolation parts are made to serve dual functions: their primary function as electrical conductors and their secondary function as structural reinforcement elements. By extending and bending these leads, they simultaneously provide electrical connectivity and prevent resin cracks, eliminating the need for separate reinforcing leads.

The lead frame structure is designed so that the isolation part leads self-reinforce the resin molded body during the molding process. The extended and bent lead structures automatically distribute stresses and prevent crack formation without requiring additional reinforcing components or complex manufacturing steps.