亚洲欧美日本韩国_久久久久亚洲AV片无码V_亚洲AV片不卡无码一_H漫全彩纯肉无码网站

 
 
當(dāng)前位置: 首頁 » 新聞資訊 » 廠商 » 正文

HAST/PCT HAST testing

分享到:
放大字體  縮小字體    發(fā)布日期:2019-03-05  來源:儀器信息網(wǎng)  作者:Mr liao  瀏覽次數(shù):615

 

HAST/PCT

 

HAST testing accelerates the penetration of moisture through the external protective materials or sealants or between the external material and conductors. This is done by applying pressure under set conditions of Temperature and Humidity continuously. This uses a non-condensing (unsaturated method) of applying super-heated steam in a pressurized and temperature controlled environment. 

Biased and Unbiased HAST Testing

HAST testing has become a standard, particularly in the Semiconductor, Solar and other Industries as the fast and effective alternative to the standard Temperature Humidity Bias testing (85C/85%RH-1000 hrs).

The HAST (Highly-Accelerated Temperature and Humidity Stress Test) has become a critical part of the device package Reliability Qualification process. It is predominantly used to evaluate the reliability of non-hermetic packaged devices under humidity environments. This is done by setting and creating the various conditions of Temperature-Humidity-Pressure within a highly controlled pressure vessel. These conditions accelerate moisture penetration through the external protective plastic package and apply these stress conditions to the die/device.

Today s technology is moving towards low profile/low geometry packing of devices with higher leakage core current which creates internal power dissipation and this in turn moves the moisture away from the die/device and this prevents the analysis of moisture-related failure mechanisms.

Per JEDEC JESD22-A110D, if the Test Specimen s dissipation exceeds 200 mw the Tj should be calculated. If the calculated value of Tj 10 C above chamber ambient then the bias to the device should be duty-cycled. This cycled bias will allow moisture collection on the die during the off periods. In general a 50% duty cycle of bias is recommended for most of the encapsulated plastic devices.

The other method to reduce/control the test devices power dissipation is by resetting the device or placing it in a sleep mode, which can be done by applying signals via external divers and control.

JEDEC standard JESD22-A110 (Biased HAST) and JESDA118 (Unbiased HAST)

Typical Conditions:

130 C/85%RH/33.3 psia and 

110 C/85%RH.17.7 psia

Duration: 96 or 264 hours

Power cycled Biased HAST testing is usually performed for high power devices.

Lot sizes can vary (44, 77, etc.) based on standards or per customer specified requirement.

We design, develop, manufacture, select materials (Critical Socket PCB material) and provide full-turnkey services for HAST boards for many types of Test Specimens.

The HAST Chamber is an effective tool for running the Surface Isolation Resistance (SIR) Analysis where the subject test specimen is typically set up with the following test parameters:

110C/85%RH/5VDC/264hours under Pressure conditions.

The HAST Chamber is also used performing Conductive Anodic Filament (Volume/Material) CAP Analysis where the subject test specimen is typically set up with the following test parameters:

130C/85%RH/3, 5VDC/96 hours under Pressure conditions. These tests are essentially used for checking out the via-to-via or plane-to-plane in PCB s.

Some of the other tests include the Electro-chemical Migration (ECM) for PCB s

Reference: JEDEC Standard JESD22-A110

返回

上一篇:EA溫度/高度/濕度試驗箱

下一篇:PCT測試和HAST高壓蒸煮測試

 
關(guān)鍵詞: 測試 下一篇 上一篇 濕度 高壓
 
打賞
[ 新聞資訊搜索 ]  [ 加入收藏 ]  [ 告訴好友 ]  [ 打印本文 ]  [ 違規(guī)舉報 ]  [ 關(guān)閉窗口 ]
免責(zé)聲明:
本網(wǎng)站部分內(nèi)容來源于合作媒體、企業(yè)機構(gòu)、網(wǎng)友提供和互聯(lián)網(wǎng)的公開資料等,僅供參考。本網(wǎng)站對站內(nèi)所有資訊的內(nèi)容、觀點保持中立,不對內(nèi)容的準(zhǔn)確性、可靠性或完整性提供任何明示或暗示的保證。如果有侵權(quán)等問題,請及時聯(lián)系我們,我們將在收到通知后第一時間妥善處理該部分內(nèi)容。
 

HAST/PCT HAST testing二維碼

掃掃二維碼用手機關(guān)注本條新聞報道也可關(guān)注本站官方微信賬號:"xxxxx",每日獲得互聯(lián)網(wǎng)最前沿資訊,熱點產(chǎn)品深度分析!
 

 
0相關(guān)評論

 
午夜无码片在线观看影视| 国产suv精品一区二区6| 麻豆aⅴ精品无码一区二区| 亚洲va欧美va国产综合| 免费a级毛片无码a∨男男| 综合色区亚洲熟妇另类| 久久婷婷五月综合色高清| 久久夜色精品国产亚洲av| 国产精品毛片无码| 亚洲综合欧美在线一区在线播放| 在线播放真实国产乱子伦| 巨爆中文字幕巨爆区爆乳| 亚洲精品无码一区二区| 久久丫精品国产亚洲av| 精品人妻va出轨中文字幕| 亚洲欧美日韩在线不卡| 潮喷失禁大喷水aⅴ无码| 18禁免费无码无遮挡不卡网站| 亚洲av无码一区二区二三区入口| 红杏亚洲影院一区二区三区| 亚洲av无码专区国产乱码不卡| 日本道精品一区二区三区| 久久香蕉国产线熟妇人妻| 日本护士xxxx视频| 久久精品国产清自在天天线| 免费观看a级毛片| 国产精品久久久福利| 亚洲乱亚洲乱妇无码| 性夜久久一区国产9人妻| 国产丰满麻豆videossexhd | 免费欧三a大片| 国产女精品视频网站免费 | 精品国品一二三产品区别在线观看| 少妇高潮惨叫喷水正在播放| 男女男精品免费视频网站| 无码专区丰满人妻斩六十路| 不卡无码人妻一区三区音频| 国产99视频精品免费专区| 三上悠亚免费观看av网站| 国产精品久久久久久久久久妞妞| 亚洲人ⅴsaⅴ国产精品|