topic Re: Offsetting X and Y coordinates of wafer in Discussions

Offsetting X and Y coordinates of wafer

Jackie_ — Fri, 09 Jun 2023 17:06:47 GMT

Hi,

I've two jmp table which has X and Y coordinates of the wafer. I would like to know if there's a way to align the coordinates of Wafer 1 with Wafer 2?

For examples: I want to align the following highlighted X and Y with the X and Y of wafer 2.

Wafer 1 : X, Y = 129, 372

Wafer 2: X, Y = -17, -15

I am not sure if there a way to recognize patterns in the graph builder and get the hover label information with JSL. Any suggestions would be much appreciated

Wafer 1 =

Wafer 2 =

Re: Offsetting X and Y coordinates of wafer

txnelson — Sun, 07 Aug 2022 18:11:01 GMT

It appears that if you add 89 to the X Coord and 58 to the Y Coord in the Wafer 2 data table, the wafermaps will align

Re: Offsetting X and Y coordinates of wafer

Jackie_ — Sun, 07 Aug 2022 23:44:46 GMT

I had to manually compare both maps to find the location of both dies in the map and the offset value. Is there a way to implement using jsl?

Re: Offsetting X and Y coordinates of wafer

txnelson — Mon, 08 Aug 2022 01:38:44 GMT

Yes!

This is a simple thing for JMP to do. In fact, this little problem is a perfect li a great little project as your first JSL project. The solution is to either add or subtract the difference between the maximum value of X Coord from Wafer 1 data table and Wafer 2 data table. And then to do the same for the Y coordinates.

The script takes the following steps

Open the data table. Here is the actual code for that

Names Default To Here( 1 );
dt1 = data table("Wafer 1");
dt2 = data table("Wafer 2");

Next, to determine the offset difference between the 2 wafers, you need to find the Absolute differeence between the maximum value in the wafer 1 X Coord column and the maximum value in the wafer 2 X Coord column.

Now repeat the same for the Y Coord columns.

The next step requires the conditional determination of whether to add or subtract the offset value. A new column needs to be created that if the X Coord column's maximum value for wafer 1 is greater than the X Coord column's maximum value for wafer 2, the offset needs to be subtracted from wafer 1's X Coord values. If that is not true, then the offset is added to the X Coord values.

This step needs to be repeated for the Y Coord.

The reading of the Scripting Guide will give you the information on the data structures a programming features available in JSL.

Re: Offsetting X and Y coordinates of wafer

Jackie_ — Mon, 08 Aug 2022 15:28:21 GMT

Names Default To Here( 1 );
Clear Globals();
Clear Log();

dt1 = data table("Wafer 1");
dt2 = data table("Wafer 2");

dt1 << New Column( "New_X", Numeric, "Continuous", Format( "Best", 12 ) );
dt1 << New Column( "New_Y", Numeric, "Continuous", Format( "Best", 12 ) );
Max_X1= Col Maximum(dt1:X Coord);
Max_Y1= Col Maximum(dt1:Y Coord);

Max_X2= Col Maximum(dt2:X Coord);
Max_Y2= Col Maximum(dt2:Y Coord);


Offset_x = abs(	Max_X2 - Max_X1);
Offset_y = abs(Max_Y2 - Max_Y1);
For( i = 1, i <= N rows(dt1), i++, 

if( Max_X1 > Max_X2, 
		
		Column(dt1, 4)[i] =  Offset_x  - Column(dt1, 1)[i] ;,
		Column(dt1, 4)[i] =   Offset_x + Column(dt1, 1)[i];
		
)
		
		
	);
For( i = 1, i <= N rows(dt1), i++, 

if( Max_Y1 > Max_Y2, 
		
		Column(dt1, 5)[i] =  Offset_y  - Column(dt1, 2)[i] ;,
		Column(dt1, 5)[i] =   Offset_y + Column(dt1, 2)[i];
		
)
		
		
	);

"A new column needs to be created that if the X Coord column's maximum value for wafer 1 is greater than the X Coord column's maximum value for wafer 2, the offset needs to be subtracted from wafer 1's X Coord values. If that is not true, then the offset is added to the X Coord values.

This step needs to be repeated for the Y Coord."

Jim, would you mind sharing an example code for the above sentence? I was able to Find the Max values for X and Y and the abs difference

Re: Offsetting X and Y coordinates of wafer

txnelson — Mon, 08 Aug 2022 21:13:23 GMT

Good work getting as far as you did. I strongly suggest you take the time to read the Scripting Guide.

Below is a modification to your code that populates the new columns

Names Default To Here( 1 );
Clear Globals();
Clear Log();

dt1 = Data Table( "Wafer 1" );
dt2 = Data Table( "Wafer 2" );

dt1 << New Column( "New_X", Numeric, "Ordinal", Format( "Best", 12 ) );
dt1 << New Column( "New_Y", Numeric, "Ordinal", Format( "Best", 12 ) );
Max_X1 = Col Maximum( dt1:X Coord );
Max_Y1 = Col Maximum( dt1:Y Coord );

Max_X2 = Col Maximum( dt2:X Coord );
Max_Y2 = Col Maximum( dt2:Y Coord );


Offset_x = Abs( Max_X2 - Max_X1 );
Offset_y = Abs( Max_Y2 - Max_Y1 );

For( i = 1, i <= N Rows( dt1 ), i++,
	If( Max_X1 > Max_X2,
		//dt1:New_X[i] = Offset_x - dt1:XCoord[i],
		//dt1:New_X[i] = Offset_x + dt1:XCoord[i]
dt1:New_X[i] = dt1:XCoord[i] - Offset_x,
dt1:New_X[i] = dt1:XCoord[i] + Offset_x
	)
);

For( i = 1, i <= N Rows( dt1 ), i++,
	If( Max_Y1 > Max_Y2,
		//dt1:New_Y[i] = Offset_y - dt1:YCoord[i],
		//dt1:New_Y[i] = Offset_y + dt1:YCoord[i]
dt1:New_Y[i] = dt1:YCoord[i] - Offset_y,
dt1:New_Y[i] = dt1:YCoord[i] + Offset_y
	)
);

Re: Offsetting X and Y coordinates of wafer

Jackie_ — Mon, 08 Aug 2022 20:51:34 GMT

@txnelson ,

Thanks, Jim. The code works but the results isn't what I expected. You see the X and Y axis don't align with the wafer 2 Map

Re: Offsetting X and Y coordinates of wafer

txnelson — Mon, 08 Aug 2022 21:11:21 GMT

I did not notice this before....the issue is you need to subtract or add the Offset from the coordinate, not the coordinate from the offset.

Names Default To Here( 1 );
Clear Globals();
Clear Log();

dt1 = Data Table( "Wafer 1" );
dt2 = Data Table( "Wafer 2" );

dt1 << New Column( "New_X", Numeric, "Ordinal", Format( "Best", 12 ) );
dt1 << New Column( "New_Y", Numeric, "Ordinal", Format( "Best", 12 ) );
Max_X1 = Col Maximum( dt1:X Coord );
Max_Y1 = Col Maximum( dt1:Y Coord );

Max_X2 = Col Maximum( dt2:X Coord );
Max_Y2 = Col Maximum( dt2:Y Coord );


Offset_x = Abs( Max_X2 - Max_X1 );
Offset_y = Abs( Max_Y2 - Max_Y1 );

For( i = 1, i <= N Rows( dt1 ), i++,
	If( Max_X1 > Max_X2,
		dt1:New_X[i] = dt1:XCoord[i] - Offset_x,
		dt1:New_X[i] = dt1:XCoord[i] + Offset_x
	)
);

For( i = 1, i <= N Rows( dt1 ), i++,
	If( Max_Y1 > Max_Y2,
		dt1:New_Y[i] = dt1:YCoord[i] - Offset_y,
		dt1:New_Y[i] = dt1:YCoord[i] + Offset_y
	)
);

Here is the original version of the code that I undependably came up with. It runs faster, but gives the same results. Take a look at the code, and check out the different approach.

Names Default To Here( 1 );
dt1 = data table("Wafer 1");
dt2 = data table("Wafer 2");

xOffset = abs(col max(dt1:X Coord) - col max(dt2:X Coord));
yOffset = abs(col max(dt1:Y Coord) - col max(dt2:Y Coord));
If( Col Max( dt1:X Coord ) > Col Max( dt2:X Coord ),
	dt1 << New Column( "New X Coord", set each value( :X Coord - xOffset ) ),
	dt1 << New Column( "New X Coord", set each value( :X Coord + xOffset ) )
);
If( Col Max( dt1:Y Coord ) > Col Max( dt2:Y Coord ),
	dt1 << New Column( "New Y Coord", set each value( :Y Coord - yOffset ) ),
	dt1 << New Column( "New Y Coord", set each value( :Y Coord + yOffset ) )
);

Re: Offsetting X and Y coordinates of wafer

Jackie_ — Tue, 09 Aug 2022 12:56:24 GMT

It doesn't work either Jim. See the results below

Re: Offsetting X and Y coordinates of wafer

txnelson — Tue, 09 Aug 2022 14:01:12 GMT

Your axes have been reversed on one of the charts

Re: Offsetting X and Y coordinates of wafer

Jackie_ — Tue, 09 Aug 2022 14:38:04 GMT

They do not match orientation wise. E.g. The top area at map 1 has Y coordinates between 0 to negative. However, in the wafer map 2 the same area is at 300 and above

Re: Offsetting X and Y coordinates of wafer

txnelson — Tue, 09 Aug 2022 14:48:36 GMT

I assumed that your wafers were measured in the same orientation, just with different xy origins. Apparently the total orientation can be different. That makes the transposition more complex, but not impossible. Do the files you read the wafers in from, contain the orientation information?

Re: Offsetting X and Y coordinates of wafer

Jackie_ — Tue, 09 Aug 2022 15:10:36 GMT

No it doesn't contain orientation information. Can we implement transposition?

Re: Offsetting X and Y coordinates of wafer

txnelson — Tue, 09 Aug 2022 15:33:56 GMT

The transposition is simple math. The issue is the determination of the orientation. The current 2 wafers appear to need to be flipped top to bottom, however, they may need to be flipped left to right also. Looking at the pattern of empty areas on the wafer, that seems to be the case. In both cases, The transposition is to subtract each value from the max value plus 1.

Re: Offsetting X and Y coordinates of wafer

Jackie_ — Thu, 11 Aug 2022 17:35:43 GMT

"The transposition is to subtract each value from the max value plus 1."
You mean to say subtract each rows of X and Y with Max value of Wafer 2 or Wafer 1?

Re: Offsetting X and Y coordinates of wafer

txnelson — Thu, 11 Aug 2022 17:53:26 GMT

It really doesn't matter. However, in your examples, you have been transposing Wafer 1, so I suggest that you continue using that wafer.

I am concerned from your question. You need to be understanding why the subtraction from the Max +1 works, not just blindly putting in the code. Make sure you examine where the die move to when the transformation is done.