©2003 Fairchild Semiconductor Corporation

Rev. D, August 2003

Mechanical Characteristics and Ratings

Fig. 7. Flatness Measurement Position of The Ceramic Substrate

Note:

7. Do not make over torque or mounting screws. Much mounting torque may cause ceramic cracks and bolts and Al heat-fin destruction.

8. Avoid one side tightening stress. Fig.8 shows the recommended torque order for mounting screws. Uneven mounting can cause the SPM ceramic substrate to

be damaged.

Fig. 8. Mounting Screws Torque Order

Item

Condition

Limits

Unit

Min.

Typ.

Max.

Mounting Torque

Mounting Screw: M4

(Note 7 and 8)

Recommended 10Kg•cm

8

10

12

Kg•cm

Recommended 0.98N•m

0.78

0.98

1.17

N•m

Ceramic Flatness

Note Fig.7

0

-

+120

um

Weight

-35

-

g

(+)

(+)

(+)

Datum Line

(+)

(+)

(+)

Datum Line

1

2

1

2