Do you have a crash?

author ： Mr. Yibo hi tech, member of we media Wang Huidong
 

The wind outside the window is a little strong , When Niu Er got up in front of the computer screen, he couldn't remember what happened , Then I feel more and more strange , But on second thought , Most of it is PCB Designed too long , Excessive use of the brain, some lack of oxygen , I didn't take a break in time to replenish it .
Early in the morning, the cold dew moistened the air , Mixed with a trace of coolness , Drops of water slid down the blurred glass on the window , Like the desolation in my heart , Let your hands be cold , But envy the water drops in the curtain to pair up , The sun is fading in my heart . Niu Er stretched , Rubbed his red eyes , Get up . Wiped the hazy moisture on the window .

The old persimmon tree in the hospital somehow , How many fruits did it bear this year , Not good. , Slightly bitter , But on second thought, this 16 Layer of PCB Finally the design is finished , Impedance requirements are also clear , Turn around and look at that section again 15 Impedance indication on page diagram , It's sweet in my heart .

The following figure shows the stacking and impedance requirements ：

 
The following figure is a screenshot of partial impedance control ：

 
Niu Erfa stayed for a while , Probably alone for a long time , I wish I had a companion . Do it yourself PCB when , She looked at my design quietly ; When you don't design yourself , Just take her hand , Look at her gentle eyebrows . Think too much , Niu Er felt that he had never drunk , I was a little drunk .

Maybe the winter fog made the weather colder , Niu Er could not help shivering , From the beautiful imagination back to reality , Looked at the empty office , Inexplicably sad in my heart . Added all night , It's time to get off work , So he checked the drawings and documents again , Take a long breath , Sent a board email , Staggered out of the door of the company .

The afternoon sun , Warm and comfortable , But Xiao Yue from the factory engineering department can't experience the comfort of this moment , Her heart was cold .

There are countless impedances on the board she evaluates , Her eyes were wide open , And for a long time , Because there are too many screenshots of impedance control on the board , Until you find them one by one , When is this the beginning .

There are two things in her mind , One is to find impedance , The other thing is to find impedance .

She stared at the screen too long , Maybe a figure is interspersed too much , Or the graphics of a moment are too dazzling , Or an accidental miss , All in all , She felt pain in her eyes , Can't work properly .

So she walked out of the office , Picked up her cell phone and described her inner thoughts to the leader , After thinking for a long time, she couldn't write the next sentence she wanted to express , It's too painful , The eyes are too painful , Most of the pain is not enough to describe , That's it .

About dusk , Niu Er hasn't rested yet .
He thought he was probably ill ,
I can't sleep ,
Sat up and smoked a cigarette .
There is no reason for this sadness ,
Look at the two eyes in the mirror sadly ,
One is swollen ,
The other is probably swollen .......
Looks like I'm going to the hospital .

There are few people in the hospital , The doctor in the Department is examining a girl's eyes , Ask questions from time to time ：
“ The girl , How did this eye become like this .”
“ Look at the picture and find the line .”
“ Oh , What line are you looking for , Such a waste of eyes .”
“ Impedance line ”
“ Oh , What is impedance line …….”

The doctor was about to ask , Suddenly I saw Niu Er with red and swollen eyes entering the Department , So I nodded to him , Motioned him to sit down , Then he asked casually ,
“ Boy, why are your eyes red and swollen ”
“ Line finding screenshot ”
“ What line are you looking for ”
“ Impedance line ”
“ ha-ha , What's going on today , It's all the impedance lines that cause trouble . You two have to talk first .”
Niu Er and the doctor probably introduced it to me by , After Xiao Yue heard it , Turned his head and looked at Niu Er , The red lips trembled twice , Only one “ you ” word , His eyes are full of moisture .

It's time to leave the hospital , Xiao Yue looked at the bright eye drops on the cow's second hand , Niu Er also looked at Mingmu eye drops on Xiao Yue's hand , No one spoke .
Time solidifies at this moment .
Finally, Niu Er bit his lip , Staring at blood red eyes , Said cautiously ：“ The girl , How to mark the impedance .”
Xiao Yue raised his head slightly , Also staring at blood red eyes , Look at Niu Er , I wanted to run up and theory , I expected to scold him heartily , But when I saw Niu Er's red and swollen eyes , I can't help feeling soft , Suddenly he laughed and made a sound , Laughing and saying ：“ Next time you mark the impedance information , Just do it the following way .”

This is the correct way to open the impedance label .
Don't look for the line , No screenshots , Just put the line width and line distance to control the impedance 、 The layer on which it is located , Reference layer , The impedance value of the control can be clearly marked .

After listening to Xiao Yue , Niu Er thought that at that time , It's even the flowers at the door of the hospital , Every inch is interesting , Every inch is shining , Because real warriors dare to face problems and correct mistakes .
 

That's exactly what it is. ：

The people in the screenshot are haggard

The person looking for the picture is heartbroken

When the cigarette ends burn out, it is ash

The story ends in tears