Results 1 to 10 of 10

Hybrid View

  1. #1
    Player
    ExKage's Avatar
    Join Date
    Jan 2014
    Location
    Ul'dah
    Posts
    1,171
    Character
    Heixin Xiaoshuita
    World
    Cactuar
    Main Class
    Warrior Lv 100
    Issues in the silicon wafer. Issues in the epitaxial layer. Microscopic defects that you can't detect in a SEM or cross-section and SEM. Issues that can't be detected by a 4 point probe or a CV plotter and needs an SRP done. Wafer Fabs are filled with techs/engineers who have to probe wafers. Put the wafers on the loaders. Put them in the Spin Rinse Dryer. They have to align the masks. They have to load the furnaces. The furnaces better be good or else they may be issues with a wafer in the lot. The techs may be part of The Great Resignation, moving elsewhere as a labor shortage. The equipment engineers leaving. The equipment engineers being trained being left with incomplete training. Multiple things. Your diffusion tube goes down. The materials like gases weren't delivered on time. The prices of metals that are deposited or sintered going up. So many things that isn't just a machine can make so many die on a wafer.

    Edit: This doesn't even go into what goes into reliability testing for semiconductors or the assembly processes. Packaging? What about packaging issues. What if the one maker of the clips you use to seal your semiconductor into a ceramic or other DIP package is leaving the business or doesn't make the clip you use anymore? Now if you have to find a new source for that, quickly. You can't just leave parts in a drybox indefinitely. Most semiconductors have a seal by date. Now if you buy new clips you run the issue of improper seals. Incompletes or pinholes. Testing? 10 day+ burn-ins, temperature tests, temp cycling etc. You don't just test a semiconductor to a set of parameters and say walah done.
    (9)
    Last edited by ExKage; 12-08-2021 at 12:53 PM.

  2. #2
    Player EZGIL's Avatar
    Join Date
    Jul 2021
    Location
    Goblet, W29 P13
    Posts
    379
    Character
    Jordan Lore
    World
    Lamia
    Main Class
    Blacksmith Lv 100
    Quote Originally Posted by ExKage View Post
    Issues in the silicon wafer. Issues in the epitaxial layer. Microscopic defects that you can't detect in a SEM or cross-section and SEM. Issues that can't be detected by a 4 point probe or a CV plotter and needs an SRP done. Wafer Fabs are filled with techs/engineers who have to probe wafers. Put the wafers on the loaders. Put them in the Spin Rinse Dryer. They have to align the masks. They have to load the furnaces. The furnaces better be good or else they may be issues with a wafer in the lot. The techs may be part of The Great Resignation, moving elsewhere as a labor shortage. The equipment engineers leaving. The equipment engineers being trained being left with incomplete training. Multiple things. Your diffusion tube goes down. The materials like gases weren't delivered on time. The prices of metals that are deposited or sintered going up. So many things that isn't just a machine can make so many die on a wafer.

    Edit: This doesn't even go into what goes into reliability testing for semiconductors or the assembly processes. Packaging? What about packaging issues. What if the one maker of the clips you use to seal your semiconductor into a ceramic or other DIP package is leaving the business or doesn't make the clip you use anymore? Now if you have to find a new source for that, quickly. You can't just leave parts in a drybox indefinitely. Most semiconductors have a seal by date. Now if you buy new clips you run the issue of improper seals. Incompletes or pinholes. Testing? 10 day+ burn-ins, temperature tests, temp cycling etc. You don't just test a semiconductor to a set of parameters and say walah done.
    This post just made me realize I have no idea whats going on.
    (2)

  3. #3
    Player
    Akiudo's Avatar
    Join Date
    Sep 2015
    Posts
    514
    Character
    Narumi Akiudo
    World
    Alpha
    Main Class
    Bard Lv 90
    Quote Originally Posted by EZGIL View Post
    This post just made me realize I have no idea whats going on.
    and that is perfectly fine and reasonable. sadly a lot of people fail to have this realization which than gives us the current forums full of people that know better than full time developers working on this game.
    (1)