Some time ago we had the good fortune to obtain a Dage X-Ray machine. For years we had been using an older machine that had been an absolutely reliable workhorse.
|Figure 1: Old machine void view.|
Since we loved our old machine, we didn't immediately recognize what the Dage machine could do for us, but when we saw how it performed, well, all we can say is, "What an eye opener!"
The Dage x-ray systems are one of the new breed of 2D machines that can rotate the beam receiving head making the Dage more like a 2 and a half D machine. Take a look at the following images.
Figure 1 is from the old x-ray machine and Figure 2 is from the Dage machine. In both images you can see a sizable void in the ball, but with the new machine we can get a better view of the characteristics of the void; its size, location and scope.
|Figure 2: New machine void view.|
In Figure 3, we tilted the board in the older machine to see if we could duplicate the view of the Dage and as you can see, it doesn't come close.
The angling of the head in the Dage provides perspective on the ball and void that is just not available in the older machine.
Additionally it is hard not to notice the clarity of the image which is part of the reason we are able to magnify the image without distortion
|Figure 3: Old machine angled view of void.|
Frequently customers ask us to take a backed off x-ray shot a BGA component just to have a record of the component appearance post-assembly.
In Figure 4 you can see the distortion at the edges of a 42.5 MM component in the picture taken with the old machine.
On the other hand, as you can see in Figure 5, the component maintains its form in the photo. Further, in practice, the Dage pictures maintain their clarity when the customer zooms in to examine specific features.
|Figure 4: Backed off image on old machine.|
Another nice feature of the new machine is the ease of measurement. On the old machine, a somewhat laborious calibration was required prior to accurate measurement. On the Dage, it's measure at will.
In the case of the void we focused on earlier, you can get a quick view of the size of this void relative to the size of the overall ball in a heartbeat. See FIgure 6.
We still haven't explored the expansive capabilities of this new machine. There are measurement and comparison routines for ball, through-hole and void measurement and other automatic features we don't completely appreciate yet.
|Figure 5: New machine backed off image of same component.|
But as you can see from the images above we are already reaping the benefits of the upgraded technology.
There are a number machines (if you search the internet you will come up with a wide variety of reputable companies.
We just happen to have the Dage that provide this angled type viewing and we are quite enthusiastic about the advantages these new machines provide.
If you want to improve your view of x-ray images from the old straight shot 2D imager, we highly recommend you give this type of machine serious consideration.
|Figure 6: Void and ball measurement on the new machine. The void diameter is about .40 MM and the ball itself is .86 MM.|
Several members of the Circuit Technology Center team contributed to this feature story.