The answer is money, but it’s not material cost that’s driving these crappy thermal interface pads, but labor expenses (and I’d guess consistency too). Pick-and-place is absurdly fast at putting components onto a PCB, and if they can put the pre-cut pads onto the board that’s huge for a manufacturer.
It’s the difference between slapping a post-it note, or the dot/line/X/cross/etc method with grease. No contest that TIM pads win for them, any fallouts get handled via warranty.
The answer is money, but it’s not material cost that’s driving these crappy thermal interface pads, but labor expenses (and I’d guess consistency too). Pick-and-place is absurdly fast at putting components onto a PCB, and if they can put the pre-cut pads onto the board that’s huge for a manufacturer.
It’s the difference between slapping a post-it note, or the dot/line/X/cross/etc method with grease. No contest that TIM pads win for them, any fallouts get handled via warranty.