Controlling the uniformity of PECVD deposition on medical syringes, cartridges, and the like
First Claim
Patent Images
1. A medical syringe barrel or medical cartridge barrel comprising:
- a wall having a generally cylindrical interior surface defining at least a portion of a lumen, the generally cylindrical interior surface having an inside diameter of 4 to 15 mm and the aspect ratio between the length and inside diameter of the generally cylindrical interior surface subjected to PECVD is from 2 to 10; and
a PECVD set of one or more plasma enhanced chemical vapor deposition coatings or layers on at least a portion of the generally cylindrical interior surface, the PECVD set comprising;
a barrier coating or layer having a mean thickness from 10 to 500 nm with a standard deviation less than the mean thickness; and
a pH protective coating or layer between the barrier coating or layer and the lumen, in which a Fourier transform infrared spectroscopy (FTIR) absorbance spectrum of the pH protective coating or layer has a ratio greater than 0.75 and at most 1.7 between;
the maximum amplitude of the Si—
O—
Si symmetrical stretch peak between about 1000 and 1040 cm−
1, andthe maximum amplitude of the Si—
O—
Si asymmetric stretch peak between about 1060 and about 1100 cm−
1.
5 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for plasma modifying a workpiece such as a medical barrel, medical barrel, vial, or blood tube is described. Plasma is provided within the lumen of the workpiece. The plasma is provided under conditions effective for plasma modification of a surface of the workpiece. A magnetic field is provided in at least a portion of the lumen. The magnetic field has an orientation and field strength effective to improve the uniformity of plasma modification of the generally cylindrical interior surface 16 of the generally cylindrical interior surface 16.
955 Citations
26 Claims
-
1. A medical syringe barrel or medical cartridge barrel comprising:
-
a wall having a generally cylindrical interior surface defining at least a portion of a lumen, the generally cylindrical interior surface having an inside diameter of 4 to 15 mm and the aspect ratio between the length and inside diameter of the generally cylindrical interior surface subjected to PECVD is from 2 to 10; and a PECVD set of one or more plasma enhanced chemical vapor deposition coatings or layers on at least a portion of the generally cylindrical interior surface, the PECVD set comprising; a barrier coating or layer having a mean thickness from 10 to 500 nm with a standard deviation less than the mean thickness; and a pH protective coating or layer between the barrier coating or layer and the lumen, in which a Fourier transform infrared spectroscopy (FTIR) absorbance spectrum of the pH protective coating or layer has a ratio greater than 0.75 and at most 1.7 between; the maximum amplitude of the Si—
O—
Si symmetrical stretch peak between about 1000 and 1040 cm−
1, andthe maximum amplitude of the Si—
O—
Si asymmetric stretch peak between about 1060 and about 1100 cm−
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A medical syringe barrel or medical cartridge barrel comprising:
-
a wall having a generally cylindrical interior surface defining at least a portion of a lumen, the generally cylindrical interior surface having an inside diameter of 4 to 15 mm; and a PECVD set of one or more plasma enhanced chemical vapor deposition coatings or layers on at least a portion of the generally cylindrical interior surface, the PECVD set comprising; a barrier coating or layer having a mean thickness from 10 to 500 nm with a standard deviation less than the mean thickness; a pH protective coating or layer between the barrier coating or layer and the lumen, in which a Fourier transform infrared spectroscopy (FTIR) absorbance spectrum of the pH protective coating or layer has a ratio greater than 0.75 and at most 1.7 between; the maximum amplitude of the Si—
O—
Si symmetrical stretch peak between about 1000 and 1040 cm−
1, andthe maximum amplitude of the Si—
O—
Si asymmetric stretch peak between about 1060 and about 1100 cm−
1; anda tie coating or layer between the barrier coating or layer and the generally cylindrical interior surface, in which the tie coating or layer has a mean thickness from greater than 0 to 10 nm. - View Dependent Claims (22)
-
-
23. A medical syringe barrel or medical cartridge barrel comprising:
-
a wall having a generally cylindrical interior surface defining at least a portion of a lumen, the generally cylindrical interior surface having an inside diameter of 4 to 15 mm; and a PECVD set of one or more plasma enhanced chemical vapor deposition coatings or layers on at least a portion of the generally cylindrical interior surface, the PECVD set comprising; a barrier coating or layer having a mean thickness from 10 to 500 nm with a standard deviation from 190 to 10 nm; and a pH protective coating or layer between the barrier coating or layer and the lumen, in which a Fourier transform infrared spectroscopy (FTIR) absorbance spectrum of the pH protective coating or layer has a ratio greater than 0.75 between; the maximum amplitude of the Si—
O—
Si symmetrical stretch peak between about 1000 and 1040 cm−
1, andthe maximum amplitude of the Si—
O—
Si asymmetric stretch peak between about 1060 and about 1100 cm−
1. - View Dependent Claims (24, 25, 26)
-
Specification