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US 2003/0112025 A1Published application
Temperature control system for burn-in boards
OwnerHarold E. Hamilton, Tom A. Tremmelinventors
Life of this patent
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OwnerHarold E. Hamilton, Tom A. Tremmelinventors
Estimating the term…
The burn-in oven is provided with a plurality of chambers, and each of the chambers has a number of stacked burn-in boards carrying devices under test. Each burn-in board is associated with an overlying fan board. The fan board divides the space between the burn-in boards so that a duct is formed on a side of the fan board opposite from its associated burn-in board. The fan boards are spaced from the burn-in boards, so that there is a space overlying the devices under tests as well. Each of the fan boards has an individual fan associated with each underlying device under test, to provide air flow through an opening directly onto the device under test. The space between each burn-in board and its associated fan board is sealed with seal plates at opposite ends of the space, and at least one of the seal plates having an adjustable damper for providing a bleed flow of cooling air through the space.
A burn-in oven having a heat control system comprising an oven chamber, at least one burn-in board supporting a plurality of devices under test, a fan board spaced from the burn-in board and overlying the devices under test, a separate fan outlet opening through the fan board overlying each device under test, a separate controllable fan for providing a flow of air through each opening onto a device under test, a sealing plate at one end of a space between the burn-in board carrying the device under test and the overlying fan board, and at least one end of the space having an adjustable damper movable to adjust the size of the opening to the space at the at least one end, and a source of cooling air at one end of the oven chamber, and an exhaust for the cooling air at an opposite end whereby a flow of air is passed across the upper surface of the fan board, and selectively through the space when the damper is opened.
In combination, a burn-in oven, and a plurality of first and second trays in the oven, combined with a cooling air flow source, the burn-in oven defining a compartment, a plurality of first trays forming burn-in boards having devices under test mounted thereon in a preselected array;
Dependencies are inferred from the claim text.