Product failure

[czhua1]

 Hello, I have a question to consult, I purchased a batch of EPM240T100C5N, ALTERA brand, batch 1807U +, 2160PCS, this batch of goods has been malfunctioning, 706PCS sometimes work, sometimes do not work, for other batches will not occur this situation. What is the problem, please? Can you submit a breakdown sample to your company for analysis? 

[ChiaLing_T_Intel]

Hi,

Thank you for contacting Intel Community. Please be noted that Intel FPGA requires details information for failure analysis request. Please help to answer questions below in order for us to better understand your position.

1. Please provide full device details.

1.1. Device name:

1.2. Full part number:

1.3. Date code:

1.4. Lot number:

1.5. Trace code:

1.6. Distributor name:

2. What is the failure rate? What is the failure rate vs. tested sample? Example: 2 out of 100 units.

3. What is the failure symptom? Please elaborate the failure symptom in detail.

4. When did the failure happen? How did you discover the failure?

5. How did you determine the failure? Please elaborate the procedures.

6. Does the failure unit ever working before failure?

7. Did they violate solder re-flow temperature profiles, moisture sensitivity? Please provide the re-flow temperature profiles.

8. Did you swap the failure device to a known good board? Is the failure following the device or board?

9. May I know if this request comes from your side or end customer side? If the request is from end customer, please provide the end customer name.

10. Is this a prototype build or volume/mass production?

11. Kindly provide quantitative investigation result that could proof the failure is Intel FPGA induced.

Thank you

Regards,

Chia Ling

[czhua1]

Hi~ all of the above questions are answered. Chinese version： 1。请提供完整的设备细节: 将Arducam mini 2MP OV2640相机与 Arduino UNO R3通过装接板连接 ,在PC上显示（http://www.arducam.com/arducam-mini-released/） 1.1。设备名称： Arducam mini 2MP OV2640相机 + Arduino UNO R3 +PC 1.2。全部零件编号： 如图片 1.3。日期代码： 1807U 1.5。跟踪代码： 如图片 1.6。经销商名称： 深圳市智捷伟业科技有限公司 税号：91440300078984839W 2。故障率是多少？失效率与测试样品有什么关系？ 1000个里面测试了700个，都是存在这个问题 三。失败的症状是什么？请详细说明失败的症状。 工作一段时间，EPM240T100C5N的一些IO工作不正常，导致相机不能够出图 4。失败是什么时候发生的？你是如何发现失败的？ 我们焊接完成后，相机需要安装镜头调焦，出现了工作不正常的情况。 5。你是如何确定失败的？请详细说明程序。 我们从2015年就使用这款芯片，一直到2018年，第一次出现这个情况。期间电路板同一个厂家做，其他器件与另外一款相机共用，不存在问题。 6。故障单元是否在故障前工作？ 工作一段时间，出现问题。 7。他们是否违反了焊料回流温度曲线，湿度敏感性？请提供回流温度曲线。 同一个厂家已经生产了4年，同一批生产的EPM570T100C5N没有这个问题，所以焊接的温度曲线不存在问题。 8。你把故障装置换成一个已知的好板了吗？设备或电路板是否出现故障？ 我们更换了其他批次EPM240就不存在这个问题。 9。请问这个请求是来自你方还是客户端？如果请求来自终端客户，请提供最终客户名称。 我方 10。这是一个原型建造还是批量生产？ 已经批量使用了4年 11。请提供定量调查结果，证明英特尔FPGA的失败是诱发的。 我们从2015年就使用这款芯片，一直到2018年，第一次出现这个情况。使用了4年，程序是不存在问题。之后我们交换了各种器件，最终发现交换了EPM240T100C5N以后，相机可以工作正常。 English version： 1. Please provide complete equipment details: Connect the Arducam Mini 2MP OV2640 camera with Arduino UNO R3 through the mounting board and display it on the PC (http://www.arducam.com/arducam-mini-released/) 1.1. Device name: Arducam Mini 2MP OV2640 camera + Arduino UNO R3 +PC 1.2. All part numbers: As a picture 1.3. Date code: 1807U 1.5. Tracking code: As a picture 1.6. Dealer Name: Shenzhen Zhijie Weiye Technology Co., Ltd. Tax number: 91440300078984839W 2. What is the failure rate? What is the relationship between failure rate and test samples? 1000 of them tested 700, which is the problem. Three. What are the symptoms of failure? Please elaborate on the symptoms of failure. After working for some time, some of EPM240T100C5N's IO work is not normal, so that the camera can't get out of the picture. 4. When did it happen? How did you find failure? After we finished welding, the camera needed to focus the lens and abnormal work. 5. How did you define failure? Please explain the procedure in detail. We used this chip from 2015 until the first time in 2018. During the same period, the circuit board is made by one manufacturer. There is no problem with other devices sharing with another camera. 6. Does the failure unit work before failure? Work for some time, there are problems. 7. Do they violate the solder reflux temperature curve and humidity sensitivity? Please provide reflux temperature curve. The same manufacturer has been producing for 4 years. EPM570T100C5N produced in the same batch does not have this problem, so there is no problem with the welding temperature curve. 8. Have you replaced the failure device with a known good board? Is there any malfunction of the equipment or circuit board? If we change the other batches of EPM240, there will be no such problem. 9. Is this request from you or the client? If the request comes from the terminal customer, please provide the final customer name. We 10. Is it a prototype construction or mass production? It has been used in bulk for 4 years. 11. Please provide quantitative survey results to prove that the failure of Intel FPGA is induced. We used this chip from 2015 until the first time in 2018. After 4 years, there is no problem with the procedure. After that, we exchanged various devices, and finally found that after the exchange of EPM240T100C5N, the camera can work normally. Thank you Miss Zhuang 2018.11.2 17:45

[ChiaLing_T_Intel]

Hi Miss Zhuang,

Thanks for your replies. However based on your description, "

After working for some time, some of EPM240T100C5N's IO work is not normal, so that the camera can't get out of the picture" is too general to let us understand the actual failure behavior at your site. Board get passed after replacing the FPGA doesn’t lead us to conclude that it is due to the FPGA failure, as this failure could be due to board design margin or external factors during part replacement. Therefore, we would need customer to verify the suspected failure device on known good board. We also like to know what kind of the failure symptom exists at your site.

• What kind of function can’t work normally?
• Did you encounter any open/short failure?
• Any abnormality on the power rail performance?
• Any suspected failure pins?

Thank you

Regards,

Chia Ling

[czhua1]

Hi Chia Ling We are also very frustrated with the chip abnormal behavior for few months. We designed a SPI camera based on this EPM240T100C5N device for years. In recent batch, we face CPLD internal logic malfunction over time, some times it doesn't work after few seconds, some times it lasts only for 20minutes. We tried to replace all the surrounding components, it doesn't help unless change the CPLD. We also want to figure out what's the root problem comes from. The internal logic is SPI slave controller, camera controller and FIFO controller. When the CPLD goes wrong the power enable pin logic to the camera is incorrect. Once we remove the CPLD power, some times it doesn't work right after re-power up the board, and need to wait for a while then re-power the board to make the SPI working correctly. Too much details, you are also welcome if you want to discuss on the phone.

[ChiaLing_T_Intel]

Hi Miss Zhuang,

When you said the power enable pin logic to the camera is incorrect when the CPLD goes wrong, would you possible to take a signal scope on the particular power behavior? Please have the signal scope on those power pins of good vs failure devices. We would like to have more information for a better understanding on your issue.

Thank you

Regards,

Chia Ling