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VISUAL CRITERIA FOR SOT669

Total questions: 13

Worksheet time: 7mins

Name
Class
Date
1.

Damaged reject if clamping mark reduces leads dimensions by how many percent?

a)

20%

b)

25%

c)

30%

d)

35%

2.

Reject if there is a metal deformation (flattened edge), on heatsink tab and leads induced during mold clamping, with dimension greater than 0.20mm or exceeds package outline dimension (POD).

a)

CHIPPED PACKAGE

b)

BURR

c)

BLADING

d)

TIP TOE

3.

Reject any evidence of impression or dent (assembly induced) on the heatsink back.

a)

Dent on Heatsink

b)

Scratch on Heatsink

c)

Flakes

d)

Incomplete Fill

4.

Reject if there is any intrusion cutting of heatsink.

a)

Intrusion on Heatsink Tab

b)

Protrusion on Heatsink Tab

c)

Burr

d)

Uncut Heatsink

5.

Reject if the leads were not completely formed.f

a)

Lump

b)

Sway Leads

c)

Stand-Off reject

d)

Tiptoe

6.

Chipping on the planes of the plastic package exposing internal part (wire, crystal, solder, leadframe pad) with dimensions Greater than 4.0mm (Longer Side) or Greater than ______ mm (Shorter Side)

a)

0.5

b)

0.4

c)

0.2

d)

0.1

7.

Reject if there is a mould flashes at the heatsink Greater than 10% measured from the encapsulation periphery.

a)

Dirty Package

b)

Contamination

c)

Mould Flashes

d)

Flakes

8.

Reject one or more scratches that exposes copper on front and back portion of the heatsink.

a)

Exposed Copper

b)

Scratch Package

c)

Dent On Heatsink

d)

Burr

9.

Reject if there is any portion of the heatsink bar, tie bar and / or index bar with punching mark but not totally cut during crop / singulation process.

a)

Uncut Dambar

b)

Uncut Heatsink

c)

Uncut Tie bar

d)

Burr

10.

Any foreign material attached on the backside package that affects the heatsink flatness.

a)

Contamination

b)

Dirty Package

c)

Foreign Material

d)

Exposed Copper

11.

Any sign of incompleteness of plastic package exposing wire, or crystal, or solder, or lead frame pad, and or center post.

a)

Contamination

b)

Burr

c)

Incomplete Fill

d)

None of the choices

12.

Reject if unit had incomplete plating or no plating on the active surface region exposing nickel or copper base material.

a)

Uncut Dambar

b)

Incomplete Fill

c)

Incomplete Leads

d)

Incomplete Plating

13.

Reject if void is greater than 0.50 mm in any direction and located at the edge of leads or pad or sidewall of a plastic package.

a)

Dirty Package

b)

Void/Pitted/Blister on Package

c)

Contamination

d)

Dent on Package