I've done whatever I want

Chapter 90 Trial and Error
With a goal in mind, Xin Tong went deep into the bonding production line for several days.

Compared with the seven major methods and SPC that he has already mastered, he increasingly feels that process parameters are more important to improve the yield of the bonding process.

Looking back, I defeated Shi Kaitian in the technical competition and won the position of manufacturing engineer. Before that, Shi Kaitian was defeated by Su Tianyi and lost the qualification to challenge the king.

Su Tianyi is in charge of the development of the process and controls the secrets of the development of process parameters. The process fundamentally determines the yield rate of the product. Shi Kaitian lost to Su Tianyi for N consecutive years. This is a matter of fate.

There is no doubt that in the new year, if Xin Tong wants to win the qualification to challenge the Four Heavenly Kings, defeating Su Tianyi becomes the only option.

To defeat Su Tianyi, relying solely on SPC exercises is far from enough, mastering and proficiently using DOE exercises is the only breakthrough.

However, to study DOE, it is obvious that this is not the scope of work of manufacturing engineers. In layman's terms, it is not doing business properly.

Things that are not done properly usually do not see the light of day and can only be done in secret.

When young people think of not doing their job properly, the glorious image of the sweeping monk in "Dragon and Ba Bu" immediately comes to mind. This gray-clothed monk who hides in the Sutra Pavilion of Shaolin Temple all his life, has learned Shaolin's unique knowledge, and his martial arts ranks first in the world.

As far as the manufacturing industry is concerned, the semiconductor industry can be called the jewel in the crown of the manufacturing industry, and its difficulty is no less than that of nuclear bombs.

In the heart of the young man, he is now in the Sutra Pavilion of the Shaolin Temple where the manufacturing industry is located.

Compared with the arrogant sweeping monk, he is not willing to be indifferent to fame and fortune. In this life, young people must shine. He wants to be a successful entrepreneur and create a shocking car-level chip with a high profile.

To be a successful entrepreneur, how can you not be high-profile?

A successful entrepreneur is the intangible asset of the company, and needs to be a high-profile platform for the company, such as Dong ~ Mingzhu of Geli, and Hua ~ Dazuiyu ~ Chengdong.

Set a minimum goal first, at least to be the top 3 in the world in your own field.

However, that is just a beautiful ideal. When you are tired, just take a look at it. The work in front of you still has to focus on the bonding process of chip manufacturing. You must learn DOE well and PK Su Tianyi.

The competition with the attributes of the jungle principle is so cruel, you have to keep stepping on the bodies of others!
Back in the dormitory, the youth carefully read the book "the SIX SIGMA WAY". According to the introduction in the book, the specific implementation of DOE is divided into seven steps.

Only those who have the ability to target can be targeted. DOE analysis first needs to determine the goals. These goals usually come from Xbar-R chart analysis, FMEA analysis, Fishbone analysis or other data collected by the seven major methods in SPC. After analysis, some results will be obtained. The key problem point.

For Xin Tong, his goal is very clear, which is to improve the product yield in the bonding process.

With the goal in mind, the next step is to analyze the entire process of the bonding process and screen out the key factors. Xin Tong has already completed these two steps, and he has locked the four key factors.

According to the steps of DOE, the next step is to determine the level of the test according to the influence trend of the main factors. The purpose of the test is to continuously narrow down the scope of suspicion just like looking for criminals.

With the impact factors and levels, DOE analysis can be used to find out the best key factors, factor combinations and values ​​with the help of tools through fewer trials, shorter trial cycles and costs.

"Gong Luo, I have encountered a very confusing problem regarding the improvement of production yield in our bonding process!" Seeing Gao Gong Luo also go down to the production workshop, Xin Tong walked up.

He wanted to find out something about DOE from this great man.

It seems very abrupt to ask for advice directly, so let's go in a circle first.

Wasn't Xin Tong the champion last year?Hasn't he always been successful in this process?Everyone else has no problem, so why does Xin Tong have it?
Has he already touched the boundary of production improvement?

"Xin Gong, why are you confused?" Luo Gaogong was full of puzzlement.

"These days, I have been thinking about bonding yield improvement, and I found that the end of improvement in production yield is our process parameters." Xin Tong's surprised expression seemed like Columbus discovered the New World.

The process parameters of Mingyueguang packaging and testing factory are all realized through DOE analysis, and he cleverly steered the topic in the direction of DOE.

"Xin Gong, you are right! Process parameters play a very critical role in improving the yield rate, otherwise our engineering department would not set up a separate process team to do this!" Luo Gaogong nodded.

I really didn't expect Xin Tong to see the problem very thoroughly. He got to the essence of the problem in one sentence.

"Oh!" The young man pretended to understand.

"Xin Tong, do you know Edison, the inventor?" Luo Gaogong saw the confusion in the young man's eyes.

The young man nodded, his deeds were known to everyone.

Luo Gaogong looked up at the ceiling, pointed to the incandescent lamp and asked, "Xin Gong, do you know that the light bulb was invented by Edison?"

The young man nodded again. This is something that all kindergarten children know.

"Do you know how Edison invented the light bulb?" Luo Gaogong continued to ask.

Xin Tong shook his head. He wanted to listen carefully to this matter. Since Luo Gaogong mentioned this matter, he must have a certain purpose.

Seeing that the young man shook his head, Luo Gaogong laughed triumphantly: "At the beginning of the 600th century, people began to use gas lamps for lighting, but the gas was easy to leak, and the lighting reform was imminent. At this time, Edison stood up and collected more than [-] lamps. A heat-resistant and luminescent material was tested one by one."

“In 45, when Edison sprinkled a length of cotton filament with charcoal powder, bent it into a horseshoe shape, heated it in a crucible, made it into a filament, and then installed it into a light bulb. A miracle happened. The light bulb could illuminate continuously for [-] hours. !”

"In this way, the world's first carbon filament incandescent lamps came out. At Christmas that year, Lopack Street, where the Edison Electric Light Company was located, was brightly lit!"

Luo Gaogong knows the story of Edison's invention of the light bulb by heart.

"More than 600 materials?" Xin Tong was very surprised.

It takes a lot of time and energy to complete the selection and testing of more than 600 heat-resistant and luminous materials, and behind the success is a lot of sweat!
"Yes, more than 600 kinds of materials mean that Edison has done many experiments, failed and started all over again. Edison is an outstanding representative of the Trial And Error (trial and error) genre. One-tenth of the inspiration and 90.00% nine of the perspiration." So far is the motto of engineers all over the world!" Luo Gaogong said.

"Trial And Error is the source of DOE analysis!" Seeing that the time was ripe, the young man directly brought the topic to DOE.

This young man's thinking is very clear, and he appreciates it.

The reason why he mentioned the story of Edison is to tell Xin Tong the complexity and importance of process parameter selection.

"Yes!" Luo Gaogong nodded.

"So how many factors and levels are generally used for DOE analysis in the bonding process?" Xin Tong directly raised doubts about DOE analysis.

There is indeed an introduction to this in the book, but different products have different characteristics. He wants to know how to carry out DOE analysis in the bonding process.

Luo Gaogong was very surprised when the youth asked about professional aspects such as factor level.

On weekdays, he did not popularize knowledge in this area to his colleagues in the manufacturing team of the engineering department.

This young man's learning ability is really super.

"Xin Tong, have you read the books on DOE?" Luo Gaogong asked rhetorically.

"It's just a little fur!" Xin Tong smiled slightly.

(End of this chapter)