Space-grade description

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DocID022757 Rev 4

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Space-grade description

1.1

Eligible products

In absence of an ESCC quality system for deliveries in die form, ST has developed

a dedicated proprietary space-grade, largely inspired by the American QML specifications.

Any ESCC qualified product can be provided in die form in compliance with this

specification.

The ST space-grade can be applied to non-ESCC and non-QML qualified products. Contact

ST for further details.

1.2

Product identification

The ST space-grade can be identified by a specific suffix (either DIE2HR or D2HR) in the

ST part number.

Example: 2N2222ADIE2HR

1.3

Die layout

ST provides, upon request, a document containing the die layout and the following

mechanical information:

•

Wafer size

•

Die size

•

Die thickness

•

Back metallization

•

Top metallization

•

Die pad size

•

Die pad identification with the corresponding die layout.

1.4

Production flow

For all products with an ESCC qualified version, ST guarantees that the mask set, diffusion

plant and diffusion process of any ST space-grade die are exactly the same as for the

corresponding ESCC qualified packaged parts.

In addition, ST space-grade dice have a guaranteed diffusion lot homogeneity for each line

item of any order, i.e., ST guarantees that wafers have been processed within the same

production batch and on the same equipment, at all process steps including diffusion,

metallization and passivation.

The manufacturing flow of space-grade die is made from wafers qualified as described

above. Eligible wafers go through the production flow summarized in Table 1.