Recently, all kind of 21C-typed electronic goods show the tendency of hightechnology and digital convergence rapidly. Also, failure mechanism which differs from original goods concept presents. Today, failure mechanism which differs from one that was happened by restricted harmful environment material before adapted the raw of environment material is changing the paradigm of reliability engineering. Thus, when applied the environment matter of original and secondary material at the electronic goods were removed, reliability assessment method and prediction stay into low level. This study suggests as solution to overcome these phenomenon. The study on the management method of environmental restriction substances which is recognized as important element in the reliability assessment about environment material of electronic goods and the study on reliability assessment method of PWB without environment material are progressed.

Abstract
 1. 서론
 2. 이론적 배경
  2.1 환경물질 신뢰성 평가의 이론적 고찰
  2.2 초가속수명시험(HALT)이론연구
 3. 환경물질제거 PWB의 Lee-Eyring Model과 실무적용 방법론
  3.1 HALT에 의한 무연 Solder 전자제품의 신뢰성평가
 4. 결론

• 이종범 | Jong-Boem Lee
• 조재립 | Jai-Rip Cho