快閃記憶卡連結器之翹曲變形分析與探討

隨著數位時代來臨，消費者擁有越來越多的手持電子裝置，諸如數位相機、PDA、MP3、行動電話..等，數位影音資料需要更多的記憶儲存空間，是造就快閃記憶卡成長最大的動機。記憶卡連結器的平面度尺寸管控非常嚴謹，因為記憶卡連結器黏合於PCB(印刷電路板)的製程是SMT (表面黏著技術)，平面度必須控制在0.15mm以內，否則連結器上的端子會有空焊現象發生，因此要達到製程要求並不容易。本論文的目的是在改善與探討快閃記憶卡連結器架構之翹曲變形現象，應用CAE模流分析軟體預測可能發生的問題，選擇出最佳的進澆模式，並利用田口(品質工程)方法探討不同的成型條件設定所可能產生的差異性，並予以最佳化。本文研究結果顯示，在電腦模擬四種不同的進澆模式中發現，進澆模式對記憶卡連結器的翹曲變形有很大的影響性。從本文模擬分析與實際驗證中，得到三點Δ型點進澆模式對產品的翹曲變形影響性最小。此外，本文建立「模流分析+田口方法」之模式，可有效求得影響產品翹曲變形之關鍵因子，有利於後續模具開發時可減少驗證時間及節省修模成本，也是對記憶卡連結器的翹曲變形研究上之一項新的進展與貢獻，並提供廠商作為改善產品品質之參考。

關鍵字

澆口；連結器；翹曲變形； SMT ； CAE ；快閃記憶卡；田口方法

並列摘要

Digital times are approaching. Customers have great interests in digital camera, MP3 and mobile phone, which are the powerful motive to create the flash memory card. The dimension control to it is strict and precise. Especially the plan ness must be controlled within 0.15mm, or empty-welding on the contact of connecter will occur, which will bring about some difficulties to bind the memory card connecter to the PCB of SMT process. This dissertation aims to probe into the warpage of flash memory card connecter, forecast the possible question through CAE analysis, and select the most proper type of gate, and optimize it through the differentiation caused by the molding condition regulation with Taguchi-methods. The research result in this thesis shows that the gate forms have great influence on the defects such as warp & deformation of memory card connecter, comparing with the four gate forms imitated by the computer; even we get the conclusion that the gate form of three Δ dots has the minimum impacts on the warp & deformation. What’s more, we establish the form of “ mold flow analysis & Taguchi-methods ” to gain the key factors that influence the products’ warp & deformation, and with this form, we can save the assessment time and save the cost of repairing the mold during the period of mold developing. And then it became one of the most outstanding achievements in the warp & deformation of research on the memory card connecter, and it also provides a reference for the supplier to improve the quality.