Abstract
The applicability of classical laminated plate theory to the prediction of thermally induced warpage of a printed wiring board is examined in this study. A bare, four-layer printed wiring board without traces has been constructed. The temperature-dependent mechanical properties of the board core materials have been measured. Closed form solutions of the differential equations of equilibrium for the classical lamination theory description of the board are obtained to predict warpage. The model accounts for material property change with temperature, the board's support conditions, and thermal gradients through the board thickness to assess the role of each in the warpage process. The warpage results predicted by the model are then compared to those obtained experimentally, using the shadow-moire technique in a simulated infrared reflow environment, to assess the model's accuracy.
| Original language | English |
|---|---|
| Title of host publication | 1998 Proceedings - 48th Electronic Components and Technology Conference, ECTC 1998 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 345-352 |
| Number of pages | 8 |
| ISBN (Print) | 0780345266 |
| DOIs | |
| State | Published - 1998 |
| Externally published | Yes |
| Event | 48th Electronic Components and Technology Conference, ECTC 1998 - Seattle, United States Duration: May 25 1998 → May 28 1998 |
Publication series
| Name | Proceedings - Electronic Components and Technology Conference |
|---|---|
| Volume | Part F133492 |
| ISSN (Print) | 0569-5503 |
Conference
| Conference | 48th Electronic Components and Technology Conference, ECTC 1998 |
|---|---|
| Country/Territory | United States |
| City | Seattle |
| Period | 05/25/98 → 05/28/98 |
Funding
The authors would like to acknowledge the support of the Georgia Tech Manufacturing Research Center and the following organizations: Motorola, AT&T, Ford and Army Missile Command (MICOM).