降低產品可靠性驗證時間之可行性分析-以A公司為例

中國的IC設計產值年成長率逐年成長，在2015年中國的IC設計產值已經超越台灣，對中國IC產業快速的崛起台灣IC產業需更努力積極面對。現今社會處於兢爭激烈、步調快速的時代裡，產品上市的時間，將成為企業成敗的主因之一，如何在最短的研發時程，推出好的產品並且降低研發費用，成為各家企業決策者的目標之一。本論文以台灣某消費性IC設計A公司為研究個案，A公司在高溫操作壽命測試(High Temperature Operating Life Test, HTOL)驗證項目的驗證時間太久及驗證成本過高，因而影響產品上市的時間，因此，A公司希望能透過加速測試，達到減少HTOL驗證的時間及成本，若A公司根據Arrhenius Model計算出來的結果，將HTOL驗證溫度由125℃提高至150℃，則HTOL驗證時間可以減少70%，HTOL驗證成本將可以減少39%。但是必須考量溫度改變對於可靠性驗證檢測項目的影響。因此本研究主要目的是規劃HTOL驗證來檢測125℃與150℃的頻率及靜態電流間沒有顯著的差異，因為驗證數據有兩個反應變數，因此本研究使用多變量變異數(Multivariate Analysis of Variance, MANOVA)分析。本研究結果顯示，頻率與靜態電流在溫度125℃及150℃之間沒有差異，並且符合可靠性驗證檢測項目之規格，因此，產品可靠性驗證不會受到影響，因此未來HTOL驗證溫度可由150℃取代125℃，可減少70%驗證時間與降低39%驗證成本。

關鍵字

高溫操作壽命測試；加速測試；多變量變異數分析；可靠性驗證

並列摘要

As the annual growth rate of IC design output value in China increased, the IC design output value in China has exceeded that in Taiwan in 2015. Facing the rise of Chinese IC industry, Taiwan has to improve its own IC industry proactively. Living in the era of which the society has fierce competition and fast-paced environment, the time of product launch is one of the main reasons for the success of enterprises. How to produce high-quality products during the shortest development time and reduce development costs has become one of the goals for every incorporated decision maker. The research case of this study is basically focusing on a consumer IC design company (Company A) in Taiwan. The certification service items of HTOL (High Temperature Operating Life Test) in Company A have long certification time and expensive costs, which influenced the time of product launch. For this reason, Company A would like to use accelerated tests to reduce the time and costs for HTOL certification. If Company A increased the HTOL verification temperature from 125℃ to 150℃ according to the evaluation results of Arrhenius Model, the duration of HTOL verification can be reduced 70% and its costs can be reduced 39%. However, we have to consider the impact of temperature change on reliability verification items in this condition. Thus, the main objectives of this study is to use HTOL verification in order to detect the frequency of 125℃ to 150℃ and to find out if there is significant difference in the static current. Due to the fact that there exist two response variables in verification data, the MANOVA (Multivariate Analysis of Variance) is adopted. According to the results of this study, that is it shows that there is no difference in frequency and static current when the temperature is at 125℃ and 150℃, and it corresponds to the requirements for reliability verification items. Therefore, the verification reliability of product will not be affected. In the future, the temperature for verification can be decreased from 150℃ to 125℃ in the hope of reducing 70% of duration for verification and 39% of verification costs.