Embedded Resistor Technology for Memory Module Design
Embedded Resistor Technology for Memory Module Design Embedded Resistor Technology for Memory Module Design
Fear Factor • Are embedded resistors reliable • Tests performed: – Bare board: Reflow shock, thermal cycle, humidity cycle, thermal soak, vibration – Assembled board: Biased humidity cycle, full memory test – Simulation: Push to tolerance, push to failure • Conclusion: At least as good as SMT 14
Embedded Resistors Make Sense • When a design can’t be done any other way • When signal integrity improvements are needed • When 15% tolerance is good enough • When shrinking fits more modules per panel 15 • When $COM is lower ( $Cost per placement X • Break even formula: Number of replaced parts ) ≤ $Cost of embedded resistors
- Page 1 and 2: EMBEDDED RESISTOR TECHNOLOGY FOR ME
- Page 3 and 4: What Customers Pay For • Register
- Page 5 and 6: 10 Pounds in a 5 Pound Sack • Cus
- Page 7 and 8: Case Study: Blade Server, VLP DIMM
- Page 9 and 10: Which DRAMs Fit DRAM sizes by suppl
- Page 11 and 12: Signal Integrity Improvements • F
- Page 13: 15% Tolerance • ±15% tolerance w
- Page 17: Thank You Bill Gervasi bilge@simple
Fear Factor<br />
• Are embedded resistors reliable<br />
• Tests per<strong>for</strong>med:<br />
– Bare board: Reflow shock, thermal cycle,<br />
humidity cycle, thermal soak, vibration<br />
– Assembled board: Biased humidity cycle, full<br />
memory test<br />
– Simulation: Push to tolerance, push to failure<br />
• Conclusion: At least as good as SMT<br />
14
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