Differences

This shows you the differences between two versions of the page.

--- fet [2016/01/03 07:17] – mcmaster
+++ fet [2025/08/04 21:23] (current) – external edit 127.0.0.1
@@ Line 36: / Line 36: @@
 ====== Examples ======
+===== Gate: poly =====
+==== RSA SecurID 1C ====
+{{:mcmaster:n_fet_no_metal.png?100}}
+Some of contact metal can be seen on the bottom but the gate itself is poly.  The [[:cmos|CMOS page]] details its use in an inverter
+==== Xilinx XC2018 ====
+{{:mcmaster:xilinx:xc2018:q.jpg?150|}}
+Similar process to the SecurID.  Left middle has a via to poly.  The poly extends right over an active area to form a transistor.  The active area has contacts at top and bottom.
+==== MOS 6522 ====
+{{:mcmaster:mos:6522:q.jpg?150|}}
+Above: delayered showing poly (textured orange), active (orange), and buried contact (shadow)
+The top polysilicon connects is driven by a via at top left.  It crosses the active area to the right to form a transistor.
+The bottom transistor side connects directly from active to poly via a buried contact.  This poly goes off to bottom left to drive another transistor.
+==== MOS 6526 ====
+{{:mcmaster:mos:6526:q.jpg|}}
+Above: top metal image
+Active area enters lower left and meets poly at a buried contact.  The poly sweeps right to up to form a transistor separating the via from the active area at the right of the image.
+==== CMOS quiz ====
+{{:quiz:metal_gate_cmos:q.jpg?300}}
+[[:quiz:3h7e0f4|See quiz]] for analysis
 ===== Gate: early metal =====
@@ Line 41: / Line 82: @@
 ==== MOS MPS7083 ====
-{{:mcmaster:mos:mps7083:q_mz.jpg?300}}
+{{:mcmaster:mos:mps7083:q_mz.jpg?150}}
-{{:mcmaster:mos:mps7083:q_dlyr1.jpg?300}}
+{{:mcmaster:mos:mps7083:q_dlyr1.jpg?150}}
 Above top: top metal.  Bottom: Al and some SiO2 removed w/ SiO2 thin film interference showing oxide thickness
@@ Line 58: / Line 99: @@
 ==== Fairchild CD4011 ====
-{{:image:fairchild_4011_transistor.jpg?300}}
+{{:image:fairchild_4011_transistor.jpg?150}}
-{{:image:cmos_metal_gate_transistor_no_metal.jpg?300}}
+{{:image:cmos_metal_gate_transistor_no_metal.jpg?150}}
 Above top: original transistor.  Bottom: very siimlar delayered transistor
@@ Line 68: / Line 109: @@
 Consider staining these to get more info.
-===== Gate: poly =====
-==== RSA SecurID 1C ====
-{{gallery>:mcmaster:n_fet_no_metal.png}}
-Some of contact metal can be seen on the bottom but the gate itself is poly.  The [[:cmos|CMOS page]] details its use in an inverter
-==== CMOS quiz ====
-{{:quiz:metal_gate_cmos:q.jpg?300}}
-[[:quiz:3h7e0f4|See quiz]] for analysis
 ====== References ======