  This paper reports the development and testing of n-type silicon pad array
detectors targeted for the Forward Calorimeter (FoCal) detector, which is an
upgrade of the ALICE detector at CERN, scheduled for data taking in
Run~4~(2029-2034). The FoCal detector includes hadronic and electromagnetic
calorimeters, with the latter made of tungsten absorber layers and granular
silicon pad arrays read out using the High Granularity Calorimeter Readout
Chip~(HGCROC). This paper covers the Technology Computer-Aided Design (TCAD)
simulations, the fabrication process, current versus voltage (IV) and
capacitance versus voltage (CV) measurements, test results with a blue LED and
$^{90}$Sr beta source, and neutron radiation hardness tests. IV measurements
for the detector showed that 90\% of the pads had leakage current below 10~nA
at full depletion voltage. Simulations predicted a breakdown voltage of 1000~V
and practical tests confirmed stable operation up to 500~V without breakdown.
CV measurements in the data and the simulations gave a full depletion voltage
of around 50~V at a capacitance of 35~pF. LED tests verified that all detector
pads responded correctly. Additionally, the 1$\times$1 cm$^2$ pads were also
tested with the neutron radiations at a fluence of $5\times10^{13}$
1~MeV~n$_{eq}$/cm$^2$.
