Electronic – Incorporating ALD1106 SPICE model in LTspice

It took some digging, but I found some definitions:

\$ \mu_n \$ is the electron mobility, which is \$ 1360 \frac{cm^2}{Vs} \$

\$ C_{ox} \$ is the capacitance per unit area of the oxide layer, which is \$ \dfrac {\epsilon_{ox}}{t_{ox}} \$

\$ {\epsilon_{ox}} = 3.45 \times 10^{-11} \frac{F}{m} \$

\$ t_{ox} \$ is the thickness of the oxide layer.

The only unknown appears to be the thickness of the oxide layer, which is already in your model (TOX = 9.5E-9), so you should be good to go.

From the LTSPice IV manual:

X. Subcircuit 
Syntax: Xxxx n1 n2 n3... <subckt name> 
[<parameter>=<expression>] 
Subcircuits allow circuitry to be defined and stored in a 
library for later retrieval by name. Below is an example of 
defining and calling a voltage divider and invoking it in a 
circuit. 
* calling a subcircuit 
* 
* This is the circuit 
X1 in out 0 divider top=9K bot=1K 
V1 in 0 pulse(0 1 0 .5m .5m 0 1m) 
* This is the subcircuit 
.subckt divider A B C 
R1 A B {top} 
R2 B C {bot} 
.ends divider 
.tran 3m 
.end 

Notice that params: never appears in the LTSpice syntax for a subcircuit call.

I am guessing that including this token in your X card has confused LTSpice about how the subcircuit should be called.