M20_Ope_E - 第222页

Chapter 5 Libraries 5-72 When the Component setting is either: 4: Partial grid, matrix 5: Partial grid, staggered First, assign the area to skip the ball check pr ocess. Squares are numbered from the outermost one (1st s…

Chapter 5 Libraries

5-71

z Ball Size Perm.

An error occurs when the measured ball size is out of the range of the Ball Size Permission in

the process of [Ball Check]>Presence&Damage. Larger the value, less strict the requirement

will be.

Unit: %, Standard: 40

Note: When

Measured ball size < Theoretical ball size x (100 - Ball size permission) ÷ 100

Measured ball size > Theoretical ball size x (100 + Ball size permission) ÷ 100,

an error occurs.

Theoretical ball size = Ball size x Ball reduction ratio ÷ 10

z Ball Reduction

Standard: 100

Unit: %

Note: Used for compensating the measured ball size when the imaged ball is reduced in size due to

lighting conditions.

z Ball Check

4: No Cheks

Ball checks are not performed.

5: Presence (outmost)

Vision-align the component based on its outermost ball square. Check for ball presence only

for the outermost ball square.

6: Presence&Damage(all)

Vision-align the component based on its outermost ball square. Check for ball presence, ball

size, and ball diameter for all the balls.

7: Presence(all)

Vision-align the component based on its outermost ball square. Check for ball presence for

all the balls. Faster than the process 6.

z Missing Ball Assignment (View>MissingData)

When the Component setting is either:

0: Full grid, matrix

1: Full grid, staggered

2: Perimeter grid, matrix

3: Perimeter grid, staggered

When balls are missing in the filled circle positions, their positions are:

BGA on the left: (X=02, Y=03)

BGA on the right: (X=06, Y=02)

The first ball

(

)

The missing ball setting for the BGA on the left is shown below. The first two digits indicate the

X position, the last two indicates the Y position. Enter the setting from the leftmost of the top

line.

Missing balls

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When the Component setting is either:

4: Partial grid, matrix

5: Partial grid, staggered

First, assign the area to skip the ball check process. Squares are numbered from the outermost

one (1st square, 2nd square...).

In the above left BGA, 4th, 5th, and 6th squares are devoid of balls. Enter their numbers (04, 05,

and 06) as shown below. Up to two square positions can be set to a field. Be sure to use the top

line for this setting. (For the above right BGA, enter “0405” to the first field.)

Second, enter the missing ball setting to the second line

following the procedure for the

Component settings: 0, 1, 2, or 3.

Note: BGA with three or more sequential missing balls in the outermost ball square may not be

vision-processed properly.

Example 1

Example 2

Example 3

Vacant squares

Missing balls

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 Settings for BGA/CSP mode (ImageLibrary>SelectComponent>BGA/CSP)

As for Ball Pitch, Ball Size, Ball Count X, Ball Count Y, click on each setting field and see the

graphical description displayed in the sub-windows.

z Ball Alignment

Click <Mode> button to select a ball alignment pattern.

Note: When your BGA/CSP substrate is made of ceramic, select [White susbtrate BGA] from

BGA/CSP type. White substrate BGA/CSP is only available on the M6.

Note: A BGA/CSP must have munimum of 4 balls up to 64 balls per outermost ball row to be

handled. Also balls in a row must be sequentially aligned, with no irregularly skipped balls.

However, even when these limitations are met, some components with unique ball pattern (see

the below example.) cannot be processed. In such a case, consult us.

Example: The following ball pattern of RDRAM can be processed:

z Perimeter Grid

Enter the outermost square number of the lacked-ball perimeter. For both examples shown

below, the setting shall be “4”.

z Partial Grid

Enter the innermost square number of the lacked- ball perimiter. For both examples shown

below, the setting shall be “4”.

Note: To enable the Partial Grid setting, enter other than “0” for Perimeter Grid.

Matrix Staggered

XY Dif Pitch Matrix

XY Dif Pitch Staggered