2167
Therefore , these coatings improve the Cu NP packing density and increase the temperature required for necking to occur which leads to better sintering of the Cu NP ink samples .
 application: coatings; material: Cu; machanical property: density; process parameter: temperature; concept or principle: necking; manufacturing process: sintering; material: Cu; material: ink
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: coatings, Cu, density, temperature, necking, sintering, Cu, ink 
Answer:
 application: coatings; material: Cu; machanical property: density; process parameter: temperature; concept or principle: necking; manufacturing process: sintering; material: Cu; material: ink