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半導(dǎo)體測(cè)試面試測(cè)試題目

時(shí)間:2024-03-28 18:59:55 春鵬 面試試題 我要投稿
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半導(dǎo)體測(cè)試面試測(cè)試題目

  在各個(gè)領(lǐng)域,我們最離不開(kāi)的就是試題了,借助試題可以更好地檢查參考者的學(xué)習(xí)能力和其它能力。一份好的試題都是什么樣子的呢?以下是小編收集整理的半導(dǎo)體測(cè)試面試測(cè)試題目,僅供參考,歡迎大家閱讀。

半導(dǎo)體測(cè)試面試測(cè)試題目

  1.The phone interviews involved some basic questions about background and a few technical questions about op amp circtuits and feedback around op amp. After that, I was invited for an all day, on-site

  interview. During this interview, I interviewed with each member of the team (5+ hrs). I was offered the position once all interviews were completed and my manager received positive feedback.

  Interview Question – Most of the questions were technical questions I expected (step response for a high-pass or low-pass RC filter, op amp circuits, etc.). One interview was different in that, he asked me to explain one of my projects to him as if he were a layman with no technical expertise (usingwhiteboard). Answer Question

  2.Interview Details – Applied online. Received a call from an engineer and he interviewed me for 40 min. All were basic questions. setup & hold time? What can you do to prevent a system going into metastable? one hot and binary encoding?

  3. Interview Details – Applied to intern via university recruiting and got an interview a week later. 45 minutes, half resume questions half technical, not a lot of time for questions or follow-up.

  Interview Question – Small and large signal behavior and gain for a simple differential pair. Answer Question

  4.Interview Details – Applied online, got an email to set up telephone interview with hiring manager, in the gap of one week phone and onsite interview

  Interview Question – position required strong signal processing background, especially in filter design, questions related to Z transform were little difficult, thought I was supposed to get transfer function at the end Answer Question

  5.Interview Details – Phone interview. The product engineer focused on asking the question regarding your resume and some basic circuit question such as filter and amplifier question.

  Interview Question – ATE experience Answer Question

  6.Interview Details – I applied through my school career services and I was contacted to schedule a phone interview. The interviewer was very flexible with the dates. At the agreed time, he called and we

  discussed my qualifications, experience and interests. He also presented some technical questions about signals, noise, cascoding and other electronic concepts.He also provided a brief job description for the job position.The interview was comfortable and enlightening.

  Interview Question – What are the disadvantages of Cascoding View Answer

  7.Interview Details – Process took about 2 weeks.

  I was selected on campus and had a phone screen by a manager where he mostly went over my resume.And then I was called for on site interview in a week.

  Had three rounds, In which they gave design problems and asked me to solve them most of them are based on Verilog.

  Also tested me on Clockdomains, timimg related questions, setup time hold time, clock tree.

  Interview Question – Timing based questions were little tricky

  8.Interview Details – On-campus interview.

  Purely technical interview for 45 minutes - interviewer was not interested in prior work and did not know anything about the department (RF analog electronics) which I was interested in or the related field.

  Questions asked:

  Derive output and gain of simple amplifier (preferably without drawing small-signal model)

  Draw Bode-plots for RLC filter

  and more in the category of basic analog electronics

  Did fairly well at the interview and received the interviewers business card but never heard from them again - no rejection, no nothing. Tried calling, emailing, calling HR, and absolutely no response. Got an automated email that theyll be back in office in 6 months. Weird.

  Interview Question – No unexpected questions, but know your stuff - rehearse the fundamental

  amplifier theory, circuit theory, filter theory and so on - everything pertaining to basic analog electronics. Be convincing, because the interviewer might try to get you to doubt your own answers even when theyre correct.

  1.為什么硅會(huì)成為集成電路應(yīng)用最廣泛的半導(dǎo)體材料?

  答:硅,鍺,氮化鎵都可用于半導(dǎo)體,硅相比于鍺和氮化鎵具有機(jī)械性能好,密度低(2.33 g/cm3),原材料充分(沙子),熱力學(xué)性能好。鍺材料最早使用,氮化鎵目前用于高頻or高速模擬電路。

  2. 高純度的多晶硅純度是多少?

  答:99.9999999%(11N)。

  3. 利用熔融多晶硅制備單晶硅的方法有哪些?

  答:直拉法(CZ法),磁控直拉法(MCZ法),懸浮區(qū)熔法(FZ法)。

  4. 制備單晶硅的種子是什么?有什么要求?

  答:籽晶。要求晶格必須保持完好,表面沒(méi)有氧化層,沒(méi)有劃傷。使用籽晶拉出的單晶硅的晶向和籽晶是相同的。其作用就像是飽和食鹽水結(jié)晶用的京種一樣,可以降低向晶體轉(zhuǎn)化的勢(shì)壘能級(jí)。

  5.晶圓的切片流程包括哪些步驟?

  答:切斷,滾圓,定晶向,切片,倒角,研磨,腐蝕,拋光,清洗和檢驗(yàn)。

  6.硅片都有哪些直徑的?直徑越大有什么優(yōu)勢(shì)?

  答:3寸,4寸,6寸,8寸,12寸,18寸。目前主流的是12寸。

  7. 什么是外延工藝?

  答:在襯底上運(yùn)用物理or化學(xué)的方法,規(guī)則的生長(zhǎng)出半導(dǎo)體薄膜的工藝。

  8. 什么是SOI技術(shù),運(yùn)用此技術(shù)有什么優(yōu)點(diǎn)?

  答:SOI:Silicon on Insulator。字面意思就是硅晶體管結(jié)構(gòu)在絕緣體之上的意思,原理就是在硅晶體管之間,加入絕緣體物質(zhì),可使兩者之間的寄生電容比原來(lái)的少上一倍。

  9.在襯底上形成外延層有什么優(yōu)點(diǎn)?

  答:外延層的晶向和襯底相同,但是外延生長(zhǎng)時(shí)摻入雜質(zhì)的類(lèi)型,濃度可以和襯底不同。例如

 、僭诟邠诫s的襯底上可以生長(zhǎng)低摻雜外延層

 、赑型外延層可以生長(zhǎng)在N型上直接形成PN結(jié)

 、弁庋訉雍穸瓤梢哉{(diào)節(jié),多個(gè)外延層可連續(xù)生長(zhǎng),可通過(guò)該方法調(diào)節(jié)厚度,摻雜濃度等形成復(fù)雜結(jié)構(gòu)的外延層。

  10.外延層的缺點(diǎn)有哪些?

  答:設(shè)備復(fù)雜,價(jià)格昂貴,外延層生長(zhǎng)速度慢。

  11. 外延層分類(lèi)是怎樣的?

  答:

 、侔垂に嚪椒ǚ诸(lèi):氣相外延,液相外延,固相外延,分子束外延

 、诎赐庋訉/襯底材料分類(lèi):同質(zhì)外延和異質(zhì)外延

 、郯垂に嚋囟确诸(lèi):高溫外延,低溫外延,變溫外延。

 、馨赐庋訉咏Y(jié)構(gòu)分類(lèi):普通外延,選擇外延和多層外延。

  12. 外延工藝有什么用途?

  答:①可用來(lái)制作雙極型晶體管。

 、诒苊忾V鎖效應(yīng),避免硅表面氧化物的淀積。

  13. 什么是氧化工藝?

  答:在硅片的表面生長(zhǎng)二氧化硅薄膜的工藝。

  14. 二氧化硅的結(jié)構(gòu)是什么樣的?

  答:正四面體結(jié)構(gòu),一個(gè)硅原子連接四個(gè)氧原子,一個(gè)氧原子連接兩個(gè)硅原子。

  15. 二氧化硅薄膜的作用是什么?

  答:二氧化硅薄膜的作用有:器件的組成,離子注入掩蔽膜,金屬互連層之間的絕緣介質(zhì),隔離工藝中的絕緣介質(zhì),鈍化保護(hù)膜。

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