KE2040Instruction Manual Ver2.01,REV04.2003.6.25 - 第392页

5 − 29 ⑫ Base S tyle Set the base style of a BG A component. T his item is available only when you select “All balls” or “All land” at t he “Contrast ” sett ing item . A base st yle is combined with a ball p att ern, the…

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⑫ Base Style

Set the base style of a BGA component. This item is available only when you

select “All balls” or “All land” at the “Contrast” setting item.

A base style is combined with a ball pattern, then used as a recognition

pattern.

Base style + Ball pattern → Recognition pattern

• How to set

When you click this setting item with the right button, the selection

pop-up menu appears on the screen.

− When you select Browse

Figure 6.7-2-18 (b) “Base Style” browser dialog box

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• Setting items

Selection on the

pop-up menu

Base style

Browse Displays sample images: from “Standard” to “Mark over spill”, and allows

you to select the desired style from the displayed images.

Standard There are only balls located on the outer frame of a package.

This setting is available for a conventional BGA whose pitch is narrow and

whose balls are small. This is available also for a component whose

index balls are on the grid.

Index mark 4 corner There are only balls and index balls on the outer frame of a package, and

index balls are outside the grid.

Index balls are located at four corners outside the grid.

Index mark 3 corner There are only balls and index balls on the outer frame of a package, and

index balls are outside the grid.

Index balls are located at three corners outside the grid (when there is no

index ball at the lower left corner, it should be called 0 degrees).

Index mark 2 corner There are only balls and index balls on the outer frame of a package, and

index balls are outside the grid.

Index balls are located at two corners outside the grid (when there is no

index ball at the lower left and right corners, it should be called 0 degrees).

Index mark 1 corner There are only balls and index balls on the outer frame of a package, and

index balls are outside the grid.

Index balls are located at one corner outside the grid (when there is no

index ball at the lower right corner, it should be called 0 degrees).

Outer belt type mark There is something whose density is similar with a ball like a belt on the

outer frame of a package.

Mark over spill There is something other than a ball on the outer frame of a package.

Note: An index mark is not a ball but a mark that indicates a certain position, or

ball-shaped substance used for partial pressure.

− Default base style sample image

Note: The size of an index ball varies and the center of an index ball and that of a

ball are not always aligned with each another on a line. To clearly identify

each setting of “Index mark 4 corner”, “Index mark 3 corner”, “Index mark 2

corner” and “Index mark 1 corner”, we define the index ball position and its

corresponding setting as follows.