Patent ID: 8152045

Claim:
A method for batch brazing in a diffusion furnace, comprising: inserting a plurality of fusible parts into a plurality of slots of at least one quartz boat; transporting the at least one quartz boat, including the fusible parts, into an interior of a reaction chamber of the diffusion furnace; disposing an insulation band near a load zone of the diffusion furnace; includes disposing the insulation band between an end cap of the reaction chamber and an inner portion of the load zone of the reaction chamber; wherein disposing the insulation band near the load zone of the diffusion furnace includes the insulation band exerting outward radial pressure to hold the insulation band in place without causing damage to the reaction chamber or the end cap; sealing the interior of the reaction chamber; adjusting an atmosphere of the interior of the reaction chamber according to a recipe; moving a preheated furnace heating element from a location spaced apart from the reaction chamber to a location in substantial proximity with the reaction chamber to increase a temperature of the atmosphere of the interior of the reaction chamber above a predefined brazing temperature for a predefined brazing time period according to the recipe.