SIPLACE TX V2 micron 设备性能参数_DMS - 第24页

24 SIPLACE Vision Board position recognition Fiducial criteria Fiducial criteria Locate 2 fiducials Locate 3 fiducials X-/Y -position, rotation angle, mean PCB distor tion Additional: sh earing, dist ortion separately in…

SIPLACE Vision

Cracked Die Detection

Crack Die Detection

The Cracked Die Detec-

tion can detect breaks

before removal from the

tape, if the crack runs

between two outer edges of

the die. Inspection is per-

formed with the PCB cam-

era. A prerequisite for

detection is that the two

parts of the die are slightly

inclined towards one

another. Detection is possi-

ble via the differing reflec-

tion angles of the two

surfaces which are inclined

towards one another.

Good

Bad

SIPLACE Vision

Board position recognition

Fiducial criteria

Locate 2 fiducials

Locate 3 fiducials

X-/Y-position, rotation angle, mean PCB distortion

Additional: shearing, distortion separately in X and Y direc-

tion

Fiducial shapes Synthetic fiducials: circle, cross, square, rectangle, dia-

mond, circular, square and rectangular contours, double

cross, pattern: any

Dimensions of patterns

Min. size

Max. size

0.5 mm

3 mm

Fiducial environment Clearance around reference fiducial not necessary if there

is no similar fiducial structure in the search area

Dimensions of synthetic fiducials

Min. X/Y size for circle

and rectangle 0.25 mm

Min. X/Y size for annulus and rectangle 0.3 mm

Min. X/Y size for cross 0.3 mm

Min. X/Y size for double cross 0.5 mm

Min. X/Y size for diamond 0.35 mm

Min. frame width for annulus and rectangle 0.1 mm

Min. bar width / bar distance for cross, double-cross 0.1 mm

Max. X/Y size for all fiducial shapes 3 mm

Max. bar width for cross/double-cross 1.5 mm

Minimum tolerances generally 2% of nominal dimension

Max. tolerances generally 20% of nominal dimension

a) To ensure high production quality of printed circuit boards, a minimum x/y size of 0.075 mm is permitted

for circular fiducials under the following conditions:

There are no other objects with a size of + 0.2 mm which are visible in the rectangular fiducial search

area. Example: Circular fiducials with an x/y size of 0.075 mm need a search area without visible objects

of: 0.075 mm + 0.2 mm = 0.275 mm.

SIPLACE Vision

Board position recognition

Technical Data and Inkspot Criteria

Ink spot criteria

Methods • Synthetic fiducial recognition method

• Mean gray scale value

• Histogram method

• Pattern recognition

Shapes and sizes of fiducials/structures for

Synthetic fiducials

Other methods

For dimensions of synthetic fiducials,

see page 24

Min. 0.3 mm

Max. 5 mm

Masking material Good coverage

Recognition time Depends on the method: 20 ms - 200ms

Description

In the cluster technology

each subpanel is assigned

an inkspot.

If this is present during the

measurement via the PCB

vision module, the corre-

sponding subpanel will not

be populated.

This function helps prevent

costs caused by unneces-

sary placement of defective

panels.

Technical data for PCB position detection

Board fiducials

Local fiducials

Library of bad panel recognition

Up to 3 (subpanels and multiple panels)

Up to 6 for the long board option (optional PCB fiducials

are output by the optimization.)

Up to 2 per PCB (may be of different type)

Up to 255 fiducial types per subpanel

Image analysis Edge detection method (singular feature) based on gray

scale values

Illumination type Front lighting

Fiducial recognition time 0.1 s

Field of vision 5.78 mm x 5.78 mm