PANG KANG YING

I have undergone my 12-week internship in Infineon Technologies (Malaysia) Sdn Bhd under Sensors Department (SENS) from July to October 2021.



During my internship in SENS, I was attached to Material Engineering (ME) under the supervision of Mrs Rebecca, a senior manufacturing engineer. I worked in the Development centre (DC) and had grabbed every opportunity to enter the production line in blocks 5 & 6 which has exposed me to various engineering knowledge and operations of the company. These lines include PSSO magnetic sensor package line, PDSOF airbag sensor package line, TDSO & TPMS Tire pressure angle sensor package line.

I have done my best to complete every task assigned by my industrial supervisor, other colleagues or manager and try to learn as much as possible during these 12 weeks. These assignments include Engineering Safe launch Lot Status update, verification of yield losses & bin rejection database, Wire bonding Process Monitoring, technical report sharing on Infineon spectroscopy system, Safe Launch Project data gathering, Statistical Process Control (SPC) data extraction as well as making delamination report on material issue rejection units.

It has been a very meaningful working experience in SENS where I have been exposed to a real industrial environment and could apply the engineering knowledge taught in the lecture rooms to real industrial situations. Besides that, I learnt a lot from my supervisor, colleagues and gained experience in technical writing in engineering works and projects. This 12-week internship has allowed me to gain value in accomplishing personal, professional and social development. Hopefully, after graduation, I will continue to work with INFINEON or any other semiconductor company.



I very much appreciate that Infineon Technologies (Malaysia) Sdn Bhd accept me as an intern student. I was treated well in the company even I will only spend 12 weeks with them. Everyone in the company is friendly and helpful, the most important thing is, I learned a lot of knowledge that I cannot learn in the class, this is the most precious thing I gain through industrial training. This is a wonderful experience having an internship in Infineon Technologies (Malaysia) Sdn Bhd.

Video Presentation of CSTR in Series

Process flow of Nitric acid manufacture using Ostwald’s process.

Equation of Ostwald Process:

4 NH₃ (g) + 5 O₂ (g) → 4 NO (g) + 6 H₂O (g)

2NO (g) + O₂ (g) → 2 NO₂ (g)

3NO₂ (g) + H₂O (l) → 2 HNO₃ (aq) + NO (g)

Reactant : NH_3 ,O₂ 

Desired product : HNO₃ 

Undesired product : NO , NO₂

Unreacted product : Excess NH₃ and O₂

Step 1 - Primary oxidation (formation of nitric acid)

Oxidation of ammonia is carried out in a catalyst chamber in which one part of ammonia and eight parts of oxygen by volume are introduced. The temperature of chamber is about 600oC. This chamber contains a platinum gauze which serves as the catalyst.

Oxidization of ammonia is a reversible and exothermic process. Therefore according to Le- chatelier’s principle, a decrease in temperature favours reaction in forwarding direction. In primary oxidization 95 per cent of ammonia is converted into nitric oxide (NO).

4 NH₃ (g) + 5 O₂ (g) → 4 NO (g) + 6 H₂O (g)

Step 2 - Secondary oxidation (formation of nitrogen dioxide)

Nitric oxide gas obtained by the oxidation of ammonia is very hot. In order to reduce its temperature, it is passed through a heat exchanger where the temperature of nitric oxide is reduced to 150oC. Nitric Oxide after cooling is transferred to another oxidizing tower where at about 50oC it is oxidized to nitrogen dioxide (NO2).

2NO (g) + O₂ (g) → 2 NO₂ (g)

Step 3 - Absorption of NO2 (formation of HNO3)

Nitrogen dioxide from secondary oxidation chamber is introduced into a special absorption tower. NO2 gas passed through the tower and water is showered over it. By the absorption, nitric acid is obtained.

3NO₂ (g) + H₂O (l) → 2 HNO₃ (aq) + NO (g)

Nitric acid so obtained is very dilute. It is recycled in absorption tower so that more and more NO2 get absorbed. HNO3, after recycle, becomes about 68 per cent concentrated.

Step 4 - Concentration

In order to increase the concentration of HNO3, vapours of HNO3 are passed over concentrated H2SO4. Being a dehydrating agent, H2SO4 absorbs water from HNO3 and concentrated HNO3 is obtained.

The conditions favouring the formation of the products at suitable reaction rates for the reaction are:

• high pressure
• excess air
• a catalyst
• as high a temperature as is consistent with practicable reaction rates, catalyst efficiency and operating pressure

Most plants operate with:

• moderate pressures (10-13 atm)
• oxygen (air)
• an alloy of platinum and rhodium as catalyst
• temperatures at 1200 K

Learning japanese was truly a great opportunity for me as it giving me a new language to understand and even talk.

For instance, i learn that we need to be confident on what we are going to do and just chill while doing any interview session neglecting you are the interviewer or else. I would like to thank my first ever Japanese lecture which is Mariko sensei because willingly to teach me japanese language from the beginning.

SMJC 1202 - INTRODUCTION TO CHEMICAL ENGINEERING

In this presentation we do research on the topic of climate change and chemical process engineering.Our topic is renewable energy. The main problem that we faced when conducting this project is we did not have sufficient time to do research as we were busy preparing our tests and projects for other subjects. Therefore, I believed if we were given ample time ,we will produces better work. 

Finally, i would like to say thank you to our both lecturer, Dr Tan and Prof. Goto , who have guiding us and giving lecturer throughout this semester. Without their patient and caring, we will not understand this subject so thoroughly. I would like to say thank you to my teammate in completing the projects together.