發(fā)布時(shí)間：2018-06-02 11:13

  本文選題：J合金 + 引線框架　； 參考：《表面技術(shù)》2017年06期

【摘要】：目的防止4J29細(xì)引線框架在電鍍Ni/Au或Ni/Pd/Au過程中鍍件細(xì)線斷裂及鍍層局部出現(xiàn)開裂。方法采用對(duì)比的方法,通過200倍放大鏡仔細(xì)觀察電鍍工藝改變或調(diào)整前后細(xì)引線鍍層外觀質(zhì)量,再經(jīng)過單片彎折實(shí)驗(yàn),觀察電鍍后細(xì)線有無斷裂或開裂現(xiàn)象,對(duì)有斷裂或開裂等缺陷的產(chǎn)品進(jìn)行統(tǒng)計(jì),計(jì)算次品率。結(jié)果電鍍前對(duì)工件進(jìn)行熱處理,基本可以消除工件電鍍后框架細(xì)線斷裂的問題。通過改變電鍍鎳工作液組成及工藝條件,能有效解決鍍件局部出現(xiàn)開裂的問題。電鍍前,原始片熱處理的工況為:溫度420~450℃,保溫時(shí)間120 min,采用自然冷卻的方式冷卻到室溫。電鍍鎳的工藝規(guī)范為:氨基磺酸鎳250~350 g/L,硼酸25~35 g/L,潤(rùn)濕劑(K12)0.01 g/L,糖精0.3~0.4 g/L,pH值3~5,溫度50~60℃,電流密度3.0~5.0 A/dm~2。結(jié)論開發(fā)了一種防止4J29引線框架電鍍后細(xì)線斷裂及電鍍層開裂的新的電鍍工藝方法。經(jīng)過企業(yè)實(shí)際使用,并抽樣進(jìn)行每單片10次90°彎折實(shí)驗(yàn),新的電鍍工藝生產(chǎn)的產(chǎn)品,其次品率穩(wěn)定控制在2%以下,其他性能檢測(cè)也符合企業(yè)產(chǎn)品質(zhì)量要求。
[Abstract]:Aim to prevent thin wire fracture and local cracking of 4J29 fine lead frame during Ni/Au or Ni/Pd/Au plating. Methods the appearance quality of fine lead coating was carefully observed by 200 times magnifying glass before and after the electroplating process was changed or adjusted, and the phenomenon of fracture or cracking of thin wire after electroplating was observed by single bending experiment. Statistics the products with defects such as fracture or cracking, calculate the rate of defective products. Results Heat treatment of workpiece before electroplating can eliminate the fracture of frame wire after electroplating. By changing the composition and process conditions of nickel plating bath, the problem of local cracking can be effectively solved. Before electroplating, the heat treatment conditions of the original sheet are as follows: temperature 420 鈩，

本文編號(hào)：1968554