Small Caps Bold ç in Lucida type 1 fonts

It's a bug in the font, which uses the normal lowercase ç instead of placing the cedilla under the small caps lowercase c.

Fixing it requires surgery in the virtual font file, I'm afraid.

Copy the file hlhbc8t.vf from the system to a working directory. Then run

vftovp hlhbc8t.vf > hlhbc8t.vpl

Now edit the created file hlhbc8t.vpl in the following way. Where you find

(CHARACTER O 347
   (CHARWD R 0.541)
   (CHARHT R 0.545)
   (CHARDP R 0.19)
   (MAP
      (SETCHAR O 347)
      )
   )

it should become

(CHARACTER O 347
   (CHARWD R 0.621)
   (CHARHT R 0.545)
   (CHARDP R 0.19)
   (MAP
      (PUSH)
      (MOVERIGHT R 0.05)
      (SETCHAR O 270)
      (POP)
      (SETCHAR C c)
      )
   )

Now run vptovf hlhbc8t.vpl, which will overwrite the file hlhbc8t.vf and also create hlhbc8t.tfm.

If, in the same working directory, you run your example file

documentclass{article}
usepackage{lucimatx}

begin{document}
{scshape Definição textbf{Definição}}
end{document}

you will get

How to always use these newly created files without further hassle? Run the following commands

> mkdir -p $(kpsewhich -var-value TEXMFHOME)/fonts/vf/bhfix/lucida
> mkdir -p $(kpsewhich -var-value TEXMFHOME)/fonts/tfm/bhfix/lucida
> mv hlhbc8t.vf $(kpsewhich -var-value TEXMFHOME)/fonts/vf/bhfix/lucida
> mv hlhbc8t.tfm $(kpsewhich -var-value TEXMFHOME)/fonts/tfm/bhfix/lucida

(where > represents the shell prompt).

I hope you're not on Windows. In case, somebody else might be able to help. I don't think that there's much hope to get fixed files from the developers.