Optical Mounting Package With Low-Melting Glass Airtight Joint

The patent changes the material parameter of the joint material from conventional resin or metal to low-melting glass, which has superior thermal stability and airtightness properties. The low-melting glass maintains structural integrity at elevated temperatures while providing reliable sealing, thus resolving the contradiction between joint reliability and thermal stability.

The patent uses a composite joint structure where low-melting glass is combined with metal fittings and light-transmitting members. This composite approach leverages the strengths of each material: the glass provides thermal stability and airtightness, while the metal fittings provide mechanical strength, achieving both reliable joint connection and thermal stability.

The patent transitions from a single-surface contact joint (conventional) to a multi-surface contact joint by having the low-melting glass contact the second surface, side surface, and first surface of the light-transmitting member. This three-dimensional engagement significantly increases joint strength without proportionally increasing complexity, as the glass naturally flows to conform to the surfaces during the joining process.

The patent merges multiple contact surfaces (side surface, second surface, and first surface) into a single integrated joint structure using low-melting glass. This unified approach provides enhanced joint strength through distributed contact areas while maintaining a relatively simple overall structure, as the glass acts as a single bonding medium across all surfaces.